PSLV-C62 strays from flight path, fails to launch satellite

PSLV-C62 Mission Failure — UPSC Study Note

1. At a Glance

• PSLV-C62 was the 64th flight of ISRO's Polar Satellite Launch Vehicle (PSLV), launched on 12 January 2026 from Satish Dhawan Space Centre (SDSC), Sriharikota. [S1][S3]
• The mission failed to place its primary payload — EOS-N1 (Earth Observation Satellite-N1) — and 15 co-passenger satellites into the intended Sun Synchronous Orbit (SSO) due to an anomaly in the third stage (PS3). [S1][S3]
• It marks the second consecutive PSLV failure, following PSLV-C61/EOS-09 (May 18, 2025) — both failures linked to the same PS3 stage. [S2][S4]
• Critically relevant to GS-III (Science & Technology) and the strategic dimension of India's space programme; tests both static knowledge of PSLV and analytical capacity on space governance. [S1]

2. Why in the News

• PSLV-C62 launched on 12 January 2026 at 10:18 a.m. from SDSC Sriharikota; anomaly detected close to the end of the third stage causing disturbance in vehicle roll rates, deviation from flight path, and total loss of mission. [S1][S3]
• ISRO Chairman V. Narayanan publicly confirmed: "Close to the end of the third stage, we saw some disturbance in the vehicle roll rates, and subsequently, a deviation was observed in the flight path." [S1]
• This is characterised as a back-to-back failure of PSLV — highly unusual for a rocket with a historically near-flawless record. [S1][S3]
• EOS-N1 is noted to be built for strategic purposes, making the failure a matter of both space and national security significance. [S1]

3. Background & Evolution

• PSLV is a four-stage rocket alternating solid (PS1, PS3) and liquid (PS2, PS4) propulsion. [S1]
• PSLV-C62 was also the return-to-flight mission after C61's failure — it was itself the comeback attempt. [S3]

4. Core Static Facts

Mission Details — PSLV-C62: - Launch date: 12 January 2026, 10:18 a.m. IST [S1][S3] - Launch site: First Launch Pad, Satish Dhawan Space Centre (SDSC), Sriharikota, Andhra Pradesh [S1] - Primary payload: EOS-N1 (Earth Observation Satellite — built for strategic purposes) [S1] - Co-passengers: 14 co-passenger satellites + 1 KID (re-entry) Capsule = 15 additional payloads [S1] - Intended orbit: Sun Synchronous Orbit (SSO) for EOS-N1 and 14 co-passengers; re-entry trajectory for KID Capsule [S1] - Mission operator: NewSpace India Limited (NSIL) — commercial arm of ISRO under Department of Space [S1] - PSLV stages: 4-stage vehicle — PS1 (solid), PS2 (liquid), PS3 (solid), PS4 (liquid) - Failure stage: PS3 (Third Stage) — roll rate disturbance → flight path deviation [S1] - Flight number: 64th flight of PSLV [S3] - ISRO Chairman at time of failure: V. Narayanan [S1]

Comparison with PSLV-C61:

EOS Naming: - EOS = Earth Observation Satellite series (renamed from older IRS/RISAT/Resourcesat nomenclature post-2020) - EOS-09 = RISAT-1B (Synthetic Aperture Radar); strategic/surveillance satellite [S2] - EOS-N1 = New generation optical/earth observation satellite (strategic) [S1]

NSIL: - Incorporated: 2019 - Parent: Department of Space, Government of India - Role: Commercialisation of ISRO's space assets; demand-driven space activities

5. Multi-Dimensional Analysis

Scientific / Technological

• Both consecutive failures originate in PS3, the solid-fuelled third stage of PSLV — suggesting a systemic issue with propulsion, nozzle vectoring, or roll-control thrusters rather than isolated incidents. [S1][S4]
• Roll rate disturbance implies loss of attitude control; the vehicle may have entered an uncontrolled spin, preventing proper payload injection. [S1]
• PSLV's workhorse status (>60 successful missions) makes two consecutive third-stage failures an anomaly requiring root-cause analysis beyond standard quality protocols. [S1][S3]
• KID Capsule (intended for re-entry trajectory experiment) was also lost — a setback for India's nascent reusable launch vehicle technology experiments. [S1]

Strategic / Geopolitical

• EOS-N1 was described as built for strategic purposes — implying defence/intelligence applications (likely reconnaissance). Its loss creates a gap in India's space-based surveillance capability. [S1]
• EOS-09 (lost on PSLV-C61) was a SAR (Synthetic Aperture Radar) satellite — critical for all-weather, day-night imaging. Back-to-back losses of strategic observation assets are consequential for national security. [S2]
• Adversaries (particularly Pakistan, China) monitor ISRO launch failures for intelligence signals.
• India's commercial launch ambitions via NSIL take a credibility hit — international customers and partners reassess mission assurance. [S1]

Economic

• PSLV-C62 was a commercial mission under NSIL — failure implies direct financial loss (satellite cost, launch service fees, insurance) and potential impact on future commercial contracts. [S1]
• India's emerging commercial space sector (boosted by IN-SPACe regulatory framework, 2020 space sector reforms) faces trust erosion after twin PSLV failures.
• India's share of the global launch services market (~$10 billion/year) is at risk if PSLV's reliability narrative is disrupted.

Governance / Administrative

• ISRO must conduct a Failure Analysis Committee (as done post-PSLV-C61) — findings must be resolved before next PSLV launch. [S4]
• IN-SPACe (Indian National Space Promotion and Authorisation Centre, 2020) and NSIL roles under scrutiny — how commercial pressures affect mission-readiness decisions.
• Transparency in public communication is notable: ISRO Chairman V. Narayanan gave a direct, prompt statement — consistent with improved ISRO communication posture post-Chandrayaan-3. [S1]

Historical

• The only prior PSLV failures before this period: inaugural flight PSLV-D1 (1993), and PSLV-C39 (2017, heat shield failure).
• Three failures in PSLV's ~30-year history with a majority concentrated in 2025–26 — marks a historic anomaly for India's most reliable rocket. [S3]

6. Recent Developments (Last 12–18 months)

• 18 May 2025: PSLV-C61 carrying EOS-09 (RISAT-1B / SAR satellite) fails — anomaly in PS3 during ISRO's 101st overall launch. ISRO forms a probe panel. [S2][S4]
• Post-May 2025: ISRO failure analysis conducted; PSLV-C62 designated as return-to-flight mission.
• 12 January 2026, 10:18 a.m.: PSLV-C62 lifts off from SDSC Sriharikota; anomaly again detected at close of PS3 (third stage); roll rate disturbance → flight path deviation → mission failure; EOS-N1 + 15 co-passenger satellites lost. [S1][S3]
• ISRO Chairman V. Narayanan announces the failure publicly and promises data analysis. [S1]
• Described as a "big setback" in media as PSLV — ISRO's workhorse rocket — suffers back-to-back failures for the first time in its history. [S1]

7. Prelims Hooks (High-Density Factual Bullets)

1. PSLV-C62 launched on 12 January 2026 from Satish Dhawan Space Centre, Sriharikota. [S1]
2. Primary payload of PSLV-C62 was EOS-N1, described as built for strategic purposes. [S1]
3. PSLV-C62 carried EOS-N1 + 14 co-passenger satellites + 1 KID Capsule (total 16 payloads). [S1]
4. Intended orbit for EOS-N1: Sun Synchronous Orbit (SSO); KID Capsule was for a re-entry trajectory. [S1]
5. The anomaly in PSLV-C62 was a disturbance in vehicle roll rates detected close to the end of the third stage (PS3). [S1]
6. PSLV-C62 was a commercial mission operated by NewSpace India Limited (NSIL), ISRO's commercial arm. [S1]
7. ISRO Chairman at the time of PSLV-C62 failure: V. Narayanan. [S1]
8. PSLV-C62 was the 64th flight of the PSLV vehicle. [S3]
9. The preceding PSLV failure was PSLV-C61 (18 May 2025), which also failed due to a PS3 anomaly. [S2][S4]
10. PSLV-C61 carried EOS-09 satellite — India's 101st overall launch attempt. [S2][S4]
11. PSLV is a four-stage rocket alternating solid–liquid–solid–liquid propulsion (PS1–PS2–PS3–PS4).
12. PSLV holds the record for launching 104 satellites in a single mission (PSLV-C37, February 2017).
13. NewSpace India Limited (NSIL) was incorporated in 2019 under the Department of Space.
14. Prior notable PSLV failures before 2025: inaugural flight PSLV-D1 (1993) and PSLV-C39 (2017, heat-shield failure).
15. The third stage failure in consecutive missions (C61 and C62) is the first back-to-back PSLV failure in the rocket's ~30-year operational history. [S1][S3]

8. Mains Relevance

GS Paper Mapping:

Plausible Mains Question Stems:

1. "ISRO's PSLV has been India's most reliable workhorse launch vehicle, but consecutive failures in 2025–26 raise questions about quality assurance and systemic risk in space programmes. Critically analyse the implications for India's commercial and strategic space objectives."

2. "The role of NewSpace India Limited (NSIL) in commercialising India's space sector has been questioned following back-to-back PSLV mission failures. Examine the governance architecture of India's space sector and suggest reforms to ensure mission reliability."

3. "Earth Observation Satellites (EOS) serve both civilian and strategic purposes. Discuss the significance of the EOS series for India's national security and disaster management, and the impact of recent mission failures on these objectives."

9. Related Topics to Study Next

10. Common Errors / Trap Areas

1. Confusing PSLV-C61 and PSLV-C62 payloads: EOS-09 was on C61 (May 2025); EOS-N1 was on C62 (January 2026). Both failed at PS3, but the satellites are distinct.

2. Assuming PSLV-C62 was ISRO's 101st mission: It was PSLV-C61 that was the 101st overall ISRO launch attempt. C62 was the 64th PSLV-specific flight.

3. Misattributing the failure stage: The anomaly was in the third stage (PS3 — solid-fuelled), not the fourth stage. Some aspirants confuse this as a payload fairing or fourth-stage issue.

4. Treating NSIL as equivalent to ISRO: NSIL is a government company under ISRO/Department of Space, responsible for commercial launches — not the research arm itself. The mission's commercial character under NSIL is examinable.

5. Overlooking EOS-N1's strategic purpose: EOS-N1 was not a routine civilian satellite — it was built for strategic (defence/reconnaissance) purposes, which elevates the significance of the loss beyond a routine commercial setback.

11. Sources

• [S1] "PSLV-C62 strays from flight path, fails to launch satellite" — The Hindu, 13 January 2026 — Article excerpt provided as primary source — (Tier 4)
• [S2] "PSLV-C61/EOS-09 Mission" — ISRO Official Page — https://www.isro.gov.in/Mission_PSLV_C61_EOS_09.html — (Tier 1)
• [S3] "ISRO's first 2026 mission PSLV-C62 fails" — Deccan Herald — https://www.deccanherald.com/science/space/isros-first-2026-mission-pslv-c62-fails-3859678 — (Tier 4 adjacent / news)
• [S4] "ISRO forms probe panel after PSLV-C61 glitch" — News on Air (AIR/Prasar Bharati) — https://www.newsonair.gov.in/isro-forms-probe-panel-after-pslv-c61-glitch-leaves-eos-09-off-target — (Government broadcaster)