Quick Links
Quick Links
UPSC Exams
Latest Update
Coaching
UPSC Current Affairs
Syllabus
UPSC Notes
Previous Year Papers
UPSC Mains Previous Year Question Papers Last 25 Years UPSC Prelims Question Papers Last 10 Years UPSC Question Papers UPSC CSE Prelims 2025 Question Paper UPSC Mains 2024 Model Answers UPSC 2024 Question Papers UPSC 2023 Question Papers UPSC 2022 Question Papers UPSC 2021 Question Papers UPSC 2020 Question Papers UPSC 2019 Question Papers UPSC 2018 Question Papers UPSC 2017 Question Papers UPSC 2016 Question Papers UPSC 2015 Question Papers UPSC 2014 Question Papers UPSC CSAT Question Papers UPSC IFS Previous Year Paper UPSC Assistant Labour Commissioner Previous Question Year Papers UPSC Combined Geo Scientist Previous Year Paper UPSC APFC Previous Year Question Papers UPSC CMS Previous Year Question Paper UPSC EPFO Previous Year Paper UPSC Air Safety Officer Previous Year Papers UPSC SO Steno Previous Year Paper UPSC IES ISS Previous Year Question Papers
Mock Tests
UPSC Editorial
Bilateral Ties
Albania India Relations India Algeria Relations Andorra India Relations India Angola Relations India Antigua Barbuda Relations India Argentina Relations Austria India Relations India Azerbaijan Relations Bahamas India Relations India Bahrain Relations Barbados India Relations India Belarus Relations Belgium India Relations Belize India Relations Benin India Relations Bolivia India Relations India Bosnia Herzegovina Relations India Botswana Relations Brazil India Relations Brunei India Relations Bulgaria India Relations Burundi India Relations Cabo Verde India Relations India Cambodia Relations India Cameroon Relations Canada India Relations India Cayman Islands Relations India Central African Republic Relations India Chad Relations Chile India Relations India Colombia Relations India Comoros Relations India Democratic Republic Of The Congo Relations India Republic Of The Congo Relations India Cook Islands Relations India Costa Rica Relations India Ivory Coast Relations India Croatia Relations India Cyprus Relations India Czech Republic Relations India Djibouti Relations India Dominica Relations India Dominican Republic Relations India Ecuador Relations India El Salvador Relations India Equatorial Guinea Relations India Eritrea Relations Estonia India Relations India Ethiopia Relations India Fiji Relations India Finland Relations India Gabon Relations India Gambia Relations India Georgia Relations Germany India Relations India Ghana Relations India Greece Relations India Grenada Relations India Guatemala Relations India Guinea Relations India Guinea Bissau Relations India Guyana Relations India Haiti Relations India Holy See Relations India Honduras Relations India Hong Kong Relations India Hungary Relations India Iceland Relations India Indonesia Relations India Iran Relations India Iraq Relations India Ireland Relations India Jamaica Relations India Kazakhstan Relations India Kenya Relations India Kingdom Of Eswatini Relations India Kiribati Relations India Kuwait Relations India Kyrgyzstan Relations India Laos Relations Latvia India Relations India Lebanon Relations India Lesotho Relations India Liberia Relations Libya India Relations Liechtenstein India Relations India Lithuania Relations India Luxembourg Relations India Macao Relations Madagascar India Relations India Malawi Relations India Mali Relations India Malta Relations India Marshall Islands Relations India Mauritania Relations India Micronesia Relations India Moldova Relations Monaco India Relations India Montenegro Relations India Montserrat Relations India Morocco Relations Mozambique India Relations India Namibia Relations India Nauru Relations Netherlands India Relations India Nicaragua Relations India Niger Relations India Nigeria Relations India Niue Relations India North Macedonia Relations Norway India Relations India Palau Relations India Panama Relations India Papua New Guinea Relations India Paraguay Relations Peru India Relations India Philippines Relations Qatar India Relations India Romania Relations Rwanda India Relations India Saint Kitts And Nevis Relations India Saint Lucia Relations India Saint Vincent And Grenadines Relations India Samoa Relations India Sao Tome And Principe Relations Saudi Arabia India Relations India Senegal Relations Serbia India Relations India Sierra Leone Relations India Singapore Relations India Slovak Republic Relations India Slovenia Relations India Solomon Islands Relations Somalia India Relations India South Sudan Relations India Spain Relations India Sudan Relations Suriname India Relations India Sweden Relations India Syria Relations India Tajikistan Relations Tanzania India Relations India Togo Relations India Tonga Islands Relations India Trinidad And Tobago Relations India Tunisia Relations India Turkmenistan Relations India Turks And Caicos Islands Relations India Tuvalu Relations India Uganda Relations India Ukraine Relations India Uae Relations India Uruguay Relations India Uzbekistan Relations India Vanuatu Relations India Venezuela Relations India British Virgin Islands Relations Yemen India Relations India Zambia Relations India Zimbabwe Relations
Books
Government Schemes
Production Linked Incentive Scheme Integrated Processing Development Scheme Rodtep Scheme Amended Technology Upgradation Fund Scheme Saathi Scheme Uday Scheme Hriday Scheme Samagra Shiksha Scheme India Nishta Scheme Stand Up India Scheme Sahakar Mitra Scheme Mdms Mid Day Meal Scheme Integrated Child Protection Scheme Vatsalya Scheme Operation Green Scheme Nai Roshni Scheme Nutrient Based Subsidy Scheme Kalia Scheme Ayushman Sahakar Scheme Nirvik Scheme Fame India Scheme Kusum Scheme Pm Svanidhi Scheme Pmvvy Scheme Pm Aasha Scheme Pradhan Mantri Mahila Shakti Kendra Scheme Pradhan Mantri Lpg Panjayat Scheme Mplads Scheme Svamitva Scheme Pat Scheme Udan Scheme Ek Bharat Shresth Bharat Scheme National Pension Scheme Ujala Scheme Operation Greens Scheme Gold Monetisation Scheme Family Planning Insurance Scheme Target Olympic Podium Scheme
Topics
NASA Space Missions
NASA Mercury-Redstone 3 (Freedom 7) Mission NASA Mercury-Redstone 4 (Liberty Bell 7) Mission NASA Mercury-Atlas 6 (Friendship 7) Mission NASA Mercury-Atlas 7 (Aurora 7) Mission NASA Mercury-Atlas 8 (Sigma 7) Mission NASA Mercury-Atlas 9 (Faith 7) Mission NASA Gemini 3 Mission NASA Gemini 4 Mission NASA Gemini 5 Mission NASA Gemini 7 Mission NASA Gemini 8 Mission NASA Gemini 9 Mission NASA Gemini 10 Mission NASA Gemini 11 Mission NASA Gemini 12 Mission NASA Apollo 1 (AS‑204) Mission NASA Apollo 7 Mission NASA Apollo 8 Mission NASA Apollo 9 Mission NASA Apollo 10 Mission NASA Apollo 11 Mission NASA Apollo 12 Mission NASA Apollo 13 Mission NASA Apollo 14 Mission NASA Apollo 15 Mission NASA Apollo 16 Mission NASA Apollo 17 Mission NASA Skylab Orbital Workshop Mission NASA Skylab 2 Mission NASA Skylab 3 Mission NASA Skylab 4 Mission NASA Apollo–Soyuz Test Project Mission NASA STS‑1 Columbia Mission NASA STS‑3 Columbia Mission NASA STS‑7 Challenger Mission NASA STS‑8 Challenger Mission NASA STS‑41B Challenger Mission NASA STS‑41G Discovery (1st female EVA) Mission NASA STS‑51L Challenger (accident) Mission NASA STS‑26 Discovery (Return‑to‑Flight) Mission NASA STS‑31 Discovery (Hubble Launch) Mission NASA STS‑49 Endeavour (first capture EVA) Mission NASA STS‑61 Endeavour (Hubble Servicing 1) Mission NASA STS‑73 Columbia (microgravity) Mission NASA STS‑95 Discovery (John Glenn returns) Mission NASA STS‑107 Columbia (accident) Mission NASA STS‑114 Discovery (RTF‑2) Mission NASA STS‑120 Discovery (Node 2) Mission NASA STS‑125 Atlantis (Final Hubble Service) Mission NASA STS‑132 Atlantis Mission NASA STS‑135 Atlantis (Final Shuttle flight) Mission NASA Artemis I (Orion/ SLS‑1) Mission NASA Artemis II (Planned) Mission NASA Artemis III (Planned lunar landing) Mission NASA Mariner 4 Mission NASA Mariner 6 Mission NASA Mariner 7 Mission NASA Mariner 9 Mission NASA Viking 1 Orbiter/Lander Mission NASA Viking 2 Orbiter/Lander Mission NASA Mars Pathfinder & Sojourner Mission NASA Mars Global Surveyor Mission NASA 2001 Mars Odyssey Mission NASA Mars Exploration Rover – Spirit Mission NASA Mars Exploration Rover – Opportunity Mission NASA Mars Reconnaissance Orbiter Mission NASA Phoenix Mars Lander Mission NASA InSight Mars Lander Mission NASA Mars 2020 (Perseverance & Ingenuity) Mission NASA Mars Sample Return – SRL (planned) Mission NASA Pioneer 10 Mission NASA Pioneer 11 Mission NASA Voyager 1 Mission NASA Voyager 2 Mission NASA Galileo Jupiter Orbiter/Probe Mission NASA Cassini–Huygens Mission NASA New Horizons (Pluto & KBO) Mission NASA Juno Mission NASA Europa Clipper (planned) Mission NASA Parker Solar Probe Mission NASA Solar Orbiter (ESA/NASA) Mission NASA Surveyor 1 Mission NASA Lunar Orbiter 1 Mission NASA Lunar Prospector Mission NASA LCROSS Mission NASA LADEE Mission NASA Lunar Reconnaissance Orbiter (LRO) Mission NASA CAPSTONE Mission NASA VIPER Rover (planned) Mission NASA NEAR Shoemaker Mission NASA Deep Space 1 Mission NASA Stardust Mission NASA Genesis Mission NASA Deep Impact Mission NASA Dawn (Vesta/Ceres) Mission NASA OSIRIS‑REx Mission NASA Lucy Mission NASA DART Mission NASA Landsat‑1 (ERTS‑1) Mission NASA Landsat‑5 Mission NASA Landsat‑9 Mission NASA Terra Mission NASA Aqua Mission NASA Aura Mission NASA Suomi NPP Mission NASA Sentinel‑6 Michael Freilich Mission NASA ICESat‑2 Mission NASA GRACE‑FO Mission NASA SMAP Mission NASA GPM Core Observatory Mission NASA CALIPSO Mission NASA CloudSat Mission NASA NISAR (NASA‑ISRO) Mission NASA Explorer 1 Mission NASA COBE Mission NASA Compton Gamma Ray Observatory Mission NASA Hubble Space Telescope Mission NASA Chandra X‑ray Observatory Mission NASA Spitzer Space Telescope Mission NASA WISE Mission NASA Kepler Mission NASA TESS Mission NASA Fermi Gamma‑ray Space Telescope Mission NASA NICER Mission NASA IXPE Mission NASA Roman Space Telescope (planned) Mission NASA NuSTAR Mission NASA GALEX Mission NASA Swift Mission NASA SOHO (ESA/NASA) Mission NASA Cluster II (ESA/NASA) Mission NASA TIMED Mission NASA STEREO‑A/B Mission NASA MMS Mission NASA IRIS Mission NASA Solar Dynamics Observatory Mission NASA X‑37B OTV‑1 (USAF/NASA liaison) Mission NASA X‑59 QueSST Mission NASA Mars Helicopter Ingenuity Mission NASA Valkyrie R5 Robot Mission NASA Low‑Boom Flight Demo Mission NASA CRS‑1 Dragon Mission NASA CRS‑1 Cygnus Mission NASA Crew Dragon Demo‑2 Mission NASA Starliner OFT‑2 Mission NASA STS-2 (Shuttle flight) Mission NASA STS-4 (Shuttle flight) Mission NASA STS-5 (Shuttle flight) Mission NASA STS-6 (Shuttle flight) Mission NASA STS-41C (Shuttle flight) Mission NASA STS-41D (Shuttle flight) Mission NASA STS-51A (Shuttle flight) Mission NASA STS-61C (Shuttle flight) Mission NASA STS-26 (Shuttle flight) Mission NASA STS-27 (Shuttle flight) Mission NASA STS-29 (Shuttle flight) Mission NASA STS-30 (Shuttle flight) Mission NASA STS-32 (Shuttle flight) Mission NASA STS-34 (Shuttle flight) Mission NASA STS-38 (Shuttle flight) Mission NASA STS-45 (Shuttle flight) Mission NASA STS-60 (Shuttle flight) Mission NASA STS-70 (Shuttle flight) Mission NASA STS-71 (Shuttle flight) Mission NASA STS-73 (Shuttle flight) Mission NASA STS-88 (Shuttle flight) Mission NASA STS-92 (Shuttle flight) Mission NASA STS-97 (Shuttle flight) Mission NASA STS-99 (Shuttle flight) Mission NASA STS-100 (Shuttle flight) Mission NASA STS-104 (Shuttle flight) Mission NASA STS-106 (Shuttle flight) Mission NASA STS-110 (Shuttle flight) Mission NASA STS-112 (Shuttle flight) Mission NASA STS-115 (Shuttle flight) Mission NASA STS-116 (Shuttle flight) Mission NASA STS-117 (Shuttle flight) Mission NASA STS-118 (Shuttle flight) Mission NASA STS-120 (Shuttle flight) Mission NASA STS-122 (Shuttle flight) Mission NASA STS-123 (Shuttle flight) Mission NASA STS-126 (Shuttle flight) Mission NASA STS-130 (Shuttle flight) Mission NASA Vanguard 1 Mission NASA Transit 1B Mission NASA Echo 1 Mission NASA Telstar 1 Mission NASA Syncom 3 Mission NASA ATS‑6 Mission NASA Skynet Mission NASA Nimbus‑1 Mission NASA Nimbus‑7 Mission NASA ERS-1 Mission NASA SeaSat Mission NASA QuikSCAT Mission NASA Jason‑1 Mission NASA Jason‑3 Mission NASA ICESat Mission NASA Earth Observing‑1 Mission NASA Orbiting Carbon Observatory‑2 Mission NASA CYGNSS Mission NASA PACE Mission NASA TRMM Mission NASA Terrestrial Planet Finder (cxl) Mission NASA Laser Interferometer Space Antenna (LISA) Mission NASA Explorer 33 Mission NASA Voyager Interstellar Mission Mission NASA Helios‑A Mission NASA Helios‑B Mission NASA ISEE‑3 (ICE) Mission NASA ACE Mission NASA DSCOVR Mission NASA IBEX Mission NASA Solar Orbiter Heliospheric Imager Mission NASA SAGE‑III ISS Mission NASA SPACE Telescope Imaging Spectrograph Mission NASA ARIEL (ESA/NASA) Mission NASA OSAM‑1 (Restore‑L) Mission NASA Dragonfly (Titan rotorcraft) Mission NASA VERITAS (Venus orbiter) Mission NASA DAVINCI (Venus probe) Mission NASA SPHEREx Mission NASA MAGGIE (Mars Geophysical) Mission NASA CLPS – Peregrine Mission NASA CLPS – VIPER Delivery Mission NASA CAPSTONE Mission NASA Gateway (HALO / PPE) Mission NASA Mars Telecommunication Orbiter (cxl) Mission NASA Mars Polar Lander (MPL) Mission NASA Mars Climate Orbiter Mission NASA Pathfinder Mission Mission NASA SLS Block 1B (Exploration Upper Stage) Mission NASA Orion Crew Module Mission NASA Commercial LEO Destinations – Axiom Station Mission NASA ISS Expedition 1 Mission NASA ISS Expedition 70 Mission NASA CRS‑11 (Dragon) Mission NASA CRS‑21 (Dragon 2) Mission NASA Snoopy CubeSat Mission
ISRO Space Missions
NVS-02 ISRO Space Mission SPADEX-A ISRO Space Mission SPADEX-B ISRO Space Mission Proba-3 ISRO Space Mission GSAT-N2 ISRO Space Mission EOS-08 ISRO Space Mission INSAT-3DS ISRO Space Mission XPoSat ISRO Space Mission Aditya-L1 ISRO Space Mission Chandrayaan-3 ISRO Space Mission NVS-01 ISRO Space Mission EOS-07 ISRO Space Mission INS-2B ISRO Space Mission EOS-06 ISRO Space Mission EOS-02 ISRO Space Mission GSAT-24 ISRO Space Mission INS-2TD ISRO Space Mission EOS-04 ISRO Space Mission EOS-03 ISRO Space Mission CMS-01 ISRO Space Mission EOS-01 ISRO Space Mission GSAT-30 ISRO Space Mission RISAT-2BR1 ISRO Space Mission Chandrayaan 2 ISRO Space Mission RISAT-2B ISRO Space Mission EMISAT ISRO Space Mission GSAT-31 ISRO Space Mission Microsat-R ISRO Space Mission GSAT-7A ISRO Space Mission GSAT-11 ISRO Space Mission HysIS ISRO Space Mission GSAT-29 ISRO Space Mission IRNSS-1I ISRO Space Mission GSAT-6A ISRO Space Mission INS-1C ISRO Space Mission Microsat ISRO Space Mission IRNSS-1H ISRO Space Mission GSAT-17 ISRO Space Mission GSAT-19 ISRO Space Mission GSAT-9 ISRO Space Mission Cartosat-2 Series Satellite INS-1A ISRO Space Mission INS-1B ISRO Space Mission RESOURCESAT-2A ISRO Space Mission GSAT-18 ISRO Space Mission INSAT-3DR ISRO Space Mission IRNSS-1G ISRO Space Mission IRNSS-1F ISRO Space Mission IRNSS-1E ISRO Space Mission GSAT-15 ISRO Space Mission GSAT-6 ISRO Space Mission IRNSS-1D ISRO Space Mission Crew module Atmospheric Re-entry Experiment (CARE) ISRO Space Mission GSAT-16 ISRO Space Mission IRNSS-1C ISRO Space Mission IRNSS-1B ISRO Space Mission GSAT-14 ISRO Space Mission Mars Orbiter Mission Spacecraft GSAT-7 ISRO Space Mission INSAT-3D ISRO Space Mission IRNSS-1A ISRO Space Mission SARAL ISRO Space Mission GSAT-10 ISRO Space Mission RISAT-1 ISRO Space Mission Megha-Tropiques ISRO Space Mission GSAT-12 ISRO Space Mission GSAT-8 ISRO Space Mission RESOURCESAT-2 ISRO Space Mission YOUTHSAT ISRO Space Mission GSAT-5P ISRO Space Mission GSAT-4 ISRO Space Mission Oceansat-2 ISRO Space Mission RISAT-2 ISRO Space Mission Chandrayaan-1 ISRO Space Mission IMS-1 ISRO Space Mission INSAT-4CR ISRO Space Mission INSAT-4B ISRO Space Mission SRE-1 ISRO Space Mission INSAT-4C ISRO Space Mission INSAT-4A ISRO Space Mission HAMSAT ISRO Space Mission EDUSAT ISRO Space Mission IRS-P6 / RESOURCESAT-1 ISRO Space Mission INSAT-3E ISRO Space Mission GSAT-2 ISRO Space Mission INSAT-3A ISRO Space Mission KALPANA-1 ISRO Space Mission INSAT-3C ISRO Space Mission GSAT-1 ISRO Space Mission INSAT-3B ISRO Space Mission Oceansat(IRS-P4) ISRO Space Mission INSAT-2E ISRO Space Mission IRS-1D ISRO Space Mission INSAT-2D ISRO Space Mission IRS-P3 ISRO Space Mission IRS-1C ISRO Space Mission INSAT-2C ISRO Space Mission IRS-P2 ISRO Space Mission SROSS-C2 ISRO Space Mission IRS-1E ISRO Space Mission INSAT-2B ISRO Space Mission INSAT-2A ISRO Space Mission SROSS-C ISRO Space Mission IRS-1B ISRO Space Mission INSAT-1D ISRO Space Mission INSAT-1C ISRO Space Mission SROSS-2 ISRO Space Mission IRS-1A ISRO Space Mission SROSS-1 ISRO Space Mission INSAT-1B ISRO Space Mission Rohini Satellite RS-D2 ISRO Space Mission INSAT-1A ISRO Space Mission Bhaskara-II ISRO Space Mission Ariane Passenger Payload Experiment (APPLE) ISRO Rohini Satellite RS-D1 ISRO Space Mission Rohini Satellite RS-1 ISRO Space Mission Rohini Technology Payload (RTP) ISRO Space Mission Bhaskara-I ISRO Space Mission Aryabhata ISRO Space Mission
Home / IAS Preparation / Science & Technology Notes / IRNSS-1G ISRO Space Mission

ISRO IRNSS-1G Navigation Satellite Mission Overview – Timeline, Progress & Scientific Aims

Last Updated on Jun 30, 2025
Download As PDF
IMPORTANT LINKS
Agriculture Notes For UPSC Public Administration UPSC Notes Modern History Books For UPSC Overseas Citizen Of India Caste System & Panchayati Raj Godavari River Federalism In India Indira Point New Development Bank Battle Of Sinhagad Sankalp And Strive Schemes Digital India High Yielding Varieties Economic Growth Development League Of Nations Ease Of Doing Business Mid Day Meal Scheme Wildlife Protection Act 1972 UPSC Notes International Union Conservation Nature

India’s space programme, led by the Indian Space Research Organisation (ISRO), has evolved from modest beginnings into one of the most respected space agencies in the world. Over the years, ISRO has designed and executed a range of missions—from satellite navigation, Earth observation, interplanetary exploration, to solar studies—that have not only enhanced India’s technological self-reliance but also contributed to global scientific collaboration. Its cost-effective approaches and mission diversity—from Chandrayaan and Mangalyaan to Aditya-L1 and the upcoming Gaganyaan—have become case studies in innovation.

For UPSC aspirants, ISROs journey is more than current affairs—it directly intersects with the syllabus of General Studies Paper 3 (Science & Technology), provides examples for GS Paper 2 (International Relations, Governance), and can enrich perspectives in the Essay Paper, Ethics, and even Optional subjects like Geography or PSIR. In this article, we will explore detailed insights about ISRO IRNSS-1G Navigation Satellite Mission —its objectives, timelines, key technologies, and strategic implications.

ISRO IRNSS-1G Navigation Satellite Mission Overview

IRNSS-1G Navigation Satellite, classified as a Navigation, was intended to serve specific technical and operational functions.The IRNSS-1G Navigation Satellite mission was designed to operate in Earth.

  • The launch of IRNSS-1G Navigation Satellite was carried out by the PSLV-C33.
  • Satish Dhawan Space Centre hosted the missions launch activities.
  • Among its key functions, IRNSS-1G Navigation Satellite was intended to Regional navigation services.
  • Supporting long-term development, IRNSS-1G Navigation Satellite worked toward Complete the 7-satellite NavIC constellation in addition to its main objective.
  • Operational (atomic clock failed later) describes the current phase of the mission.

IRNSS-1G Navigation Satellite Space Mission Overview for UPSC

Mission Name

IRNSS-1G Navigation Satellite

Mission Abbreviation

IRNSS-1G

Mission Type

Navigation

Target Celestial Body or Orbit

Earth

Primary Objective

Regional navigation services

Secondary Objectives

Complete the 7-satellite NavIC constellation

Mission Status

Operational (atomic clock failed later)

Get Free Materials for UPSC Preparation by Testbook!

- www.khautorepair.com
📚 Exclusive Free UPSC Notes Created by Our Experts
Subjects PDF Link
Download Free Ancient History Notes PDF Created by UPSC Experts Download Link
Grab the Free Economy Notes PDF used by UPSC Aspirants Download Link
Get your hands on the most trusted Free UPSC Environmental Notes PDF Download Link
Exclusive Free Indian Geography PDF crafted by top mentors Download Link
UPSC Toppers’ trusted notes, Now FREE for you. Download the Polity Notes PDF today! Download Link
Thousands of UPSC aspirants are already using our FREE UPSC notes. Get World Geography Notes PDF Here Download Link

FREEMentorship Program by
Ravi Kapoor, Ex-IRS
UPSC Exam-Hacker, Author, Super Mentor, MA
100+ Success Stories
Key Highlights
Achieve your Goal with our mentorship program, offering regular guidance and effective exam strategies.
Cultivate a focused mindset for exam success through our mentorship program.
2 Lakh+ Students Mentored Get
Get Free Mentorship Now
UPSC Beginners Program

Get UPSC Beginners Program SuperCoaching @ just

₹50000

Claim for free
Want to know more about this pass ?
Explore SuperCoaching

Timeline & Milestones of ISRO IRNSS-1G Navigation Satellite Mission
  • The scheduled launch date for IRNSS-1G Navigation Satellite was April 28, 2016.

Timeline & Milestones

Proposal Date

N/A

Critical Design Review (CDR) Date

N/A

Assembly Complete Date

N/A

Launch Date

April 28, 2016

Landing / Flyby Date

N/A

End of Primary Mission Date

N/A

Checkout: Daily UPSC Current Affairs for your upcoming exam and get thorough with detailed Insights, Trends and Latest Developments for UPSC CSE Exam

ISRO IRNSS-1G Navigation Satellite Mission Technical Specifications

As a Navigation mission, IRNSS-1G Navigation Satellite was built around a configuration involving I-1K bus, Rubidium atomic clocks.ISRO inserted the satellite into Geostationary Orbit (GEO), where it could perform its functions related to Regional navigation services.

  • To fulfill its scientific mandate, IRNSS-1G carried instruments such as Navigation and ranging payloads.
  • The mission made use of L5-band, S-band, which are standard for applications in Navigation operations.
  • Satellite navigation technology formed the core technological base for the Navigation mission IRNSS-1G Navigation Satellite.

Technical Specifications

Spacecraft Technical Specifications

I-1K bus, Rubidium atomic clocks

Scientific Payloads

Navigation and ranging payloads

Orbit Details

Geostationary Orbit (GEO)

Communication Frequencies / Band

L5-band, S-band

Key Technologies Used

Satellite navigation technology

Download UPSC Previous Year Question Paper PDFs for UPSC Prelims & Mains!

IRNSS-1G Navigation Satellite Launch Information
  • ISRO conducted the launch of IRNSS-1G Navigation Satellite on April 28, 2016, as per mission planning.
  • For this mission, IRNSS-1G Navigation Satellite was placed into orbit using PSLV-C33.
  • Satish Dhawan Space Centre served as the location for the mission’s liftoff.

Launch Information

Launch Vehicle

PSLV-C33

Launch Site

Satish Dhawan Space Centre

Who are the Stakeholders & Collaborators?

According to official information, ISRO were associated with the mission.

    Stakeholders & Collaboration

    Agencies Involved

    ISRO

    Commercial Partners

    N/A

    International Partners

    N/A

    Payload Contributions by Partners

    N/A

    Data Sharing Policy

    N/A

    Outputs, Applications & Impact of ISRO IRNSS-1G Navigation Satellite Mission

    The mission is remembered for its contribution as Completed the initial NavIC constellation.The data gathered from IRNSS-1G Navigation Satellite included Navigation and timing data, supporting multiple domains.

    • Navigation, tracking, disaster management, timing, fleet management are among the key civilian benefits derived from IRNSS-1G.
    • IRNSS-1G Navigation Satellite supports sectoral priorities and government initiatives through Completed NavIC constellation, reducing reliance on foreign systems.
    • The strategic vision behind IRNSS-1G Navigation Satellite includes future missions like IRNSS-1I (replacement for 1A), NVS series satellites, designed to extend the platform’s capabilities and applications.

    Outputs, Applications & Impact of IRNSS-1G Navigation Satellite Mission

    Data Outputs and Applications

    Navigation and timing data

    Major Achievements

    Completed the initial NavIC constellation

    Applications in Civilian Life

    Navigation, tracking, disaster management, timing, fleet management

    Impact on Policy & Global Collaboration

    N/A

    Environmental Impact & Sustainability

    N/A

    Strategic Significance & Policy Alignment

    Completed NavIC constellation, reducing reliance on foreign systems

    Follow-up Missions or Extensions

    IRNSS-1I (replacement for 1A), NVS series satellites

    Cost Estimate

    N/A

    ISRO IRNSS-1G Navigation Satellite Space Mission Risks, Failures & Mitigation

    IRNSS-1G Navigation Satellite encountered challenges such as Atomic clock failure during its execution.

    • Post-launch updates revealed that IRNSS-1G Navigation Satellite faced Atomic clock failure.
    • Used for messaging services was taken after reviewing the anomalies during IRNSS-1G.
    • Engineering evaluations highlighted Importance of robust clock systems for future applications.

    Risks, Failures & Mitigation

    Challenges Faced

    Atomic clock failure

    Risk Mitigation Measures

    N/A

    Failures or Anomalies

    Atomic clock failure

    Corrective Actions Taken

    Used for messaging services

    Lessons Learned

    Importance of robust clock systems

    UPSC Relevance of ISRO IRNSS-1G Navigation Satellite Space Mission
    • Missions like Chandrayaan, Mangalyaan, and Aditya-L1 have frequently appeared in previous year questions, highlighting the importance of knowing mission-specific features.
    • UPSC often expects candidates to critically evaluate the gaps or opportunities in India’s space sector, where ISROs mission track record provides factual backing.
    • ISRO’s consistent success under public scrutiny and budget limitations can be used to discuss institutional discipline and public accountability.
    • Environmental Science and Geography papers can benefit from examples of ISRO’s contributions to disaster management, glacier mapping, and crop estimation.

    Past UPSC Mains PYQs on ISRO Space Missions

    Q1. Discuss the role of the private sector in the growth of the space industry in India. How has the governments policy of 2023 affected it? (2023, GS Paper 3 - Science & Technology)

    Q2. What is India’s plan to have its own space station and how will it benefit our space programme? (2022 & 2019, GS Paper 3 - Science & Technology)

    Q3. Space has been the next big frontier for mankind after sea and land. In this context, discuss Indias policy and preparedness for space wars. (2019, GS Paper 3 - Science & Technology)

    Q4. Discuss the utility of the Mars Orbiter Mission (MOM) for India. (2016, GS Paper 3 - Science & Technology)

    Q5. What do you understand by Standard Positioning Systems and Precision Positioning Systems in the GPS era? Discuss the advantages India perceives from its ambitious IRNSS programme employing just seven satellites. (2015, GS Paper 3 - Science & Technology)

    Past UPSC Prelims PYQs on ISRO Space Missions

    Q1 [2025]: GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?

    I. It is designed to provide additional accuracy and integrity.
    II. It will allow more uniform and high quality air traffic management.
    III. It will provide benefits only in aviation but not in other modes of transportation.

    Select the correct answer using the code given below.

    (a) I, II and III
    (b) II and III only
    (c) I only
    (d) I and II only

    Correct Answer: (d) I and II only

    Explanation: Statements I and II correctly describe the core purpose and benefit of the GAGAN system. (I) GAGAN is designed to augment GPS signals by correcting for errors, which provides much greater accuracy and guarantees the integrity (reliability) of the positioning information. (II) This enhanced accuracy and reliability directly enables more precise aircraft routing and landing procedures, thus improving the uniformity and quality of air traffic management.

    Q2 [2022]: If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth?

    1. GPS and navigation systems could fail.
    2. Tsunamis could occur at equatorial regions.
    3. Power grids could be damaged.
    4. Intense auroras could occur over much of the Earth.
    5. Forest fires could take place over much of the planet.
    6. Orbits of the satellites could be disturbed.
    7. Shortwave radio communication of the aircraft flying over polar regions could be interrupted.

    Select the correct answer using the code given below:

    (a) 1, 2, 4 and 5 only
    (b) 2, 3, 5, 6 and 7 only
    (c) 1, 3, 4, 6 and 7 only
    (d) 1, 2, 3, 4, 5, 6 and 7

    Answer: The correct answer is (c).

    Explanation: A major solar storm can disrupt GPS, power grids, satellite orbits, polar radio communication, and cause auroras, but cannot trigger tsunamis or forest fires.

    Q3 [2020]: The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft.” The experiment in question refers to

    (a) Voyager-2
    (b) New horizons
    (c) Lisa Pathfinder
    (d) Evolved LISA

    Answer: The correct answer is (d) Evolved LISA.

    Explanation: Evolved LISA (Laser Interferometer Space Antenna) is a planned space-based gravitational wave observatory by ESA and NASA, using three spacecraft in a triangular formation with laser beams to detect cosmic gravitational waves.

    Q4 [2016]: Consider the following statements:

    The Mangalyaan launched by ISRO

    1. is also called the Mars Orbiter Mission
    2. made India the second country to have a spacecraft orbit the Mars after USA
    3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt

    Which of the statement(s) given above is/are correct?

    (a) 1 only
    (b) 2 and 3 only
    (c) 1 and 3 only
    (d) 1, 2 and 3


    Answer: c) 1 and 3 only

    Explanation: Mangalyaan is the informal name of Mars Orbiter Mission (MOM), launched by ISRO on 5 November 2013 and India is the only nation to date to have succeeded on its maiden attempt.

    Enroll in our UPSC Civil Services Exam (Prelims) 2026 Mock Test Series for targeted practice, realistic exam simulation, and strategic insights.

    UPSC Practice Questions on ISRO Space Missions

    Q1. In ISRO project Chandrayaan-3, what is the name of half-humanoid robot for artificial intelligence?
    1. Vyom - chitra
    2. Vyom - putra
    3. Vyom - pitra
    4. Vyommitra
    Answer: Vyommitra
    Solution: Vyommitra is the name of the half-humanoid robot developed by ISRO for the Chandrayaan-3 project. Vyommitra is designed to simulate human functions in space, providing data and feedback on various conditions and experiments during the mission. This half-humanoid robot can perform multiple tasks, including operating equipment, and will help in enhancing the efficiency of the mission. Vyommitra is part of ISRO's efforts to advance in space exploration and technology, focusing on safety and reducing the risks associated with human space travel.

    Q2. Recently, which mission received the 2024 John L. Jack Swigert Jr. Award for space exploration?
    1. Chandrayaan-3 Mission
    2. Mars Orbiter Mission
    3. Gaganyaan Mission
    4. Chandrayaan-2 Mission
    Answer: Chandrayaan-3 Mission
    Solution: Chandrayaan-3 Mission received the 2024 John L. Jack Swigert Jr. Award for space exploration. The award is presented by the Space Foundation to recognize extraordinary accomplishments in the field of space exploration. Chandrayaan-3 is a mission by the Indian Space Research Organisation ISRO aimed at landing on the moon. It follows the Chandrayaan-2 Mission and aims to demonstrate end-to-end capability in safe landing and roving on the lunar surface. The mission includes a lander and a rover but does not have an orbiter, as the Chandrayaan-2 orbiter is still functioning and can relay data to Earth.

    Q3. Indian Space Research Organisation ISRO has successfully carried out the static test of which solid rocket booster, which is human rated version of the S 200 rocket booster of the Geosynchronous Satellite Launch Vehicle MkIII?
    1. HS200
    2. LS200
    3. NS400
    4. KS400
    Answer: HS200
    Solution: HS200 is the human-rated version of the S200 solid rocket booster used in the Geosynchronous Satellite Launch Vehicle MkIII GSLV MkIII, which is now also called LVM3. This booster is specially designed for the Gaganyaan mission, India's first human spaceflight program. The static test of HS200 was successfully conducted by the Indian Space Research Organisation ISRO to validate its performance and ensure safety for human-rated missions. The HS200 has a diameter of 3.2 meters, a length of 20 meters, and uses 200 tons of solid propellant, making it one of the largest boosters built by ISRO. Its development marks a critical step toward ensuring the reliability and safety of the Gaganyaan mission, which aims to send Indian astronauts Gagannauts into space.

    Q4. The NEEMO program, which conducts analog space missions in underwater environments, is an initiative of which country?
    1. Japan
    2. Russia
    3. Germany
    4. United States
    Answer: United States
    Solution: NEEMO NASA Extreme Environment Mission Operations is a program run by the United States. It is conducted by NASA in underwater habitats to simulate space mission conditions, providing astronauts with experience in extreme and isolated environments similar to space. ISRO has launched India's first analog space mission in Leh Ladakh to plan lunar mission experiments. It has been developed by joint collaboration of ISRO's Human Spaceflight Center, AAKA space studio, university of Ladakh and IIT Bombay. Analog space missions are field tests done in locations that have physical similarities to that of the extreme space environments. It may include testing of new technologies, robotic systems, vehicles, study of behavioral effects isolation and confinement.

    Q5. What is the name of the satellite launched into space by ISRO recently for observing the sun?
    1. Aditya-L1
    2. Aditya-M1
    3. Chandrayaan-3
    4. EOS-7
    Answer: Aditya-L1
    Solution: The Indian Space Research Organisation ISRO recently launched Aditya-L1, India's first space-based mission dedicated to studying the Sun. The spacecraft was launched on September 2, 2023, aboard the PSLV-C57 rocket from the Satish Dhawan Space Centre in Sriharikota. Aditya-L1 is positioned in a halo orbit around the Lagrange point 1 L1 of the Sun-Earth system, approximately 1.5 million kilometers from Earth. This strategic location allows continuous observation of the Sun without any occultation or eclipses, providing real-time data on solar activities and their effects on space weather. The mission carries seven payloads designed to study various aspects of the Sun, including the photosphere, chromosphere, and the outermost layers, the corona. These instruments will help in understanding solar phenomena such as solar flares, coronal mass ejections, and their impact on the Earth's climate and environment. Aditya-L1 marks a significant milestone in India's space exploration efforts, enhancing our understanding of solar dynamics and contributing valuable data to the global scientific community.

    Q6. With reference to ISRO's upcoming mission Shukrayaan-I, consider the following statements:
    Shukrayaan is India's first mission to Saturn to study the planet's surface and atmosphere.
    The satellite is planned to be launched onboard the GSLV Mk III rocket.
    Which of the statements given above is/are correct?
    1. I only
    2. II only
    3. Both I and II
    4. None of the above
    Answer: None of the above
    Solution: Shukrayaan-I is not India's first mission to Saturn, but rather a mission to Venus. The primary objective of Shukrayaan-I is to study the surface and atmosphere of Venus, not Saturn. Shukrayaan-I is indeed planned to be launched onboard the GSLV Mk III rocket.

    Q7. What is the name of the first mapping satellite of India?
    1. EDUSAT
    2. CARTOSAT-I
    3. ARYABHATTA
    4. APOLLO-9
    Answer: CARTOSAT-I
    Solution: CARTOSAT-I was the first Indian satellite dedicated to cartographic applications and mapping purposes. It was launched by the Indian Space Research Organisation ISRO on May 5, 2005, using the PSLV-C6 launch vehicle from the Sriharikota spaceport. The satellite was equipped with two panchromatic cameras that provided stereo imaging, which was instrumental in creating 3D terrain models and detailed maps. CARTOSAT-I was primarily used for urban and rural development planning, infrastructure management, land use mapping, and disaster management support.

    Q8. In 2024, India unveiled four Air Force pilots shortlisted for its maiden Gaganyaan mission. What is the primary objective of the mission?
    1. To land on the Moon
    2. To send a satellite into orbit
    3. To send astronauts into space and bring them back
    4. To establish a space station
    Answer: To send astronauts into space and bring them back
    Solution: Gaganyaan is India's first human spaceflight mission. The mission aims to send astronauts into space and bring them back safely. It is being developed by the Indian Space Research Organisation ISRO. Four Indian Air Force pilots have been shortlisted for the mission. The mission is expected to enhance India's capabilities in human spaceflight.

    Q9. Which of the following statements regarding Satellites launched by ISRO is/are correct?
    1. CMS-01 is a Communication Satellite.
    2. GAST-6A is an Earth Observation Satellite.
    3. Mission EOS-03 was Unsuccessful.
    4. INS-1C is a Navigation Satellite.
    1. Only 1
    2. Only 2
    3. Only 1 and 3
    4. Only 2 and 4
    Answer: Only 1 and 3
    Solution: CMS-01 is a communication satellite launched by ISRO. CMS-01 is designed to provide extended coverage for communication services, particularly in the Indian mainland and islands. Mission EOS-03 aimed at Earth observation was unsuccessful. The failure was attributed to a technical anomaly that resulted in the satellite not reaching its planned orbit. GAST-6A is not an Earth Observation Satellite. It is a communication satellite launched by ISRO to improve communication capabilities. INS-1C is not a Navigation Satellite. It is a small satellite developed by ISRO for carrying payloads and conducting experiments in space.

    Q10. Indian Space Research Organization, formed in the year
    1. 1962
    2. 1960
    3. 1969
    4. 1966
    Answer: 1969
    Solution: The Indian Space Research Organization ISRO was founded on August 15, 1969. ISRO was established under the leadership of Dr. Vikram Sarabhai, regarded as the father of the Indian space program. The organization was formed to harness space technology for national development while pursuing space science research and planetary exploration. ISRO replaced the Indian National Committee for Space Research INCOSPAR, which was established in 1962.

    Subject-wise Prelims Previous Year Questions

    Geography PYQ UPSC Prelims

    Polity PYQ UPSC Prelims

    Environment PYQ UPSC Prelims

    Ancient History PYQ UPSC Prelims

    Modern History PYQ UPSC Prelims

    Medieval History PYQ UPSC Prelims

    Report An Error
    Exams Tests Super Practice