UPSC Study Note: PSLV Anomaly (PSLV-C62/EOS-N1) — Detection & Resolution
1. At a Glance
- PSLV (Polar Satellite Launch Vehicle) is ISRO's workhorse four-stage rocket alternating solid (S) and liquid (L) propulsion stages (S–L–S–L). [1]
- The PSLV-C62 / EOS-N1 mission (launched January 2026) experienced an in-flight anomaly, becoming one of the few PSLV failures in a largely successful programme history. [2]
- A National Level Expert Committee was constituted by ISRO to determine the root cause and recommend corrective measures before the next flight. [3]
- Examined by Dr. Jitendra Singh (Minister of State, PMO & Department of Space) in Parliament — relevant to GS-III (Space Technology) and GS-II (Governance/Parliamentary accountability). [3]
2. Why in the News
- PSLV-C62 / EOS-N1 was launched in January 2026; an anomaly was detected in the PSLV vehicle during the mission, resulting in mission deviation from intended objectives. [2]
- Dr. Jitendra Singh (MoS, PM's Office / Department of Space) disclosed details in a Parliamentary Question response (PIB, February 2026), confirming the anomaly and remedial steps. [3]
- Triggered fresh debate on ISRO's failure analysis mechanism, return-to-flight protocols, and accountability in India's space programme. [3]
3. Background & Evolution
| Year |
Milestone |
| 1993 |
PSLV-D1 — first developmental flight (partial failure) |
| 1994 |
PSLV-D2 — first fully successful flight |
| 1999 |
PSLV-C2 — first multi-satellite launch (three satellites) |
| 2008 |
PSLV-C11 — Chandrayaan-1 launch |
| 2017 |
PSLV-C37 — world record: 104 satellites in single launch |
| 2023 |
PSLV-C56 — DS-SAR & co-passenger mission (XPoSat, 2023) |
| Jan 2026 |
PSLV-C62 / EOS-N1 — anomaly detected; fleet grounded pending review [2] |
- Predecessors: SLV-3 (1979–83) and ASLV (1987–94) preceded PSLV; both had mixed records.
- PSLV variants: Standard (4 strap-on boosters), PSLV-CA (Core Alone, no strap-ons), PSLV-XL (6 enlarged strap-ons), PSLV-DL/QL (2/4 strap-ons). [1]
4. Core Static Facts
| Parameter |
Detail |
| Full Name |
Polar Satellite Launch Vehicle |
| Administering Body |
ISRO (Indian Space Research Organisation) under Department of Space (DoS) |
| Nodal Ministry |
Ministry of Science & Technology / PMO (DoS reports to PM) |
| Enabling Act |
Space Activities Act, 2023 (India's first dedicated space law) |
| Launch Pad |
Satish Dhawan Space Centre (SDSC), Sriharikota, Andhra Pradesh |
| Stage Configuration |
4 stages: PS1 (solid) – PS2 (liquid, Vikas engine) – PS3 (solid) – PS4 (liquid) |
| Payload Capacity (SSO) |
~1,750 kg to Sun-Synchronous Orbit (XL variant) |
| Mission — PSLV-C62 |
EOS-N1 (Earth Observation Satellite) — January 2026 [2] |
| Anomaly Response |
National Level Expert Committee constituted; fleet stand-down pending corrective measures [3] |
| Parliamentary Disclosure |
Jitendra Singh (MoS, PMO) — PIB Ref PRID 2247712 [3] |
| SSLV |
Small Satellite Launch Vehicle — also covered in the same Parliamentary Q&A [3] |
5. Multi-Dimensional Analysis
Scientific / Technological
- PSLV's four-stage alternating propulsion (solid+liquid) makes it reliable for SSO/GTO missions but complex to diagnose mid-flight anomalies; any single-stage deviation cascades to mission failure. [1]
- EOS series (Earth Observation Satellites) are critical for agriculture monitoring, disaster management, and cartography — PSLV-C62's anomaly delays these operational capabilities. [2]
- ISRO's failure analysis protocol mirrors NASA's CAIB model: an independent National Level Expert Committee reviews telemetry data, identifies root cause (propulsion, avionics, structural, or software), and mandates corrective action before return-to-flight. [3]
Geopolitical / Strategic
- India's commercial space market aspirations (via IN-SPACe and NSIL) are directly impacted — satellite launch contracts with foreign clients depend on PSLV reliability.
- Competitor context: SpaceX Falcon 9, Arianespace, and China's Long March 2D compete in the same SSO launch market. Any PSLV grounding creates market vulnerability.
- India's commitments under bilateral space cooperation MoUs (e.g., with France-CNES, NASA, JAXA) may face delays. [2]
Governance / Administrative
- Department of Space reports directly to the Prime Minister (not a line ministry), giving the PMO direct oversight — hence Jitendra Singh's parliamentary response. [3]
- IN-SPACe (Indian National Space Promotion and Authorisation Centre, est. 2020) and NSIL (NewSpace India Ltd.) are downstream stakeholders; a PSLV stand-down affects their launch manifest. [3]
- The Space Activities Act 2023 mandates operator licensing and liability frameworks — a domestic anomaly tests regulatory accountability for the first time. [1]
Historical
- PSLV has had only 2 failures in its history (PSLV-D1 in 1993; PSLV-C39 in 2017 — heat shield failure); this makes PSLV-C62 the third anomaly, rare in ~60 missions. [1]
- India's reliability record (~95%+ success rate) is a key selling point for NSIL commercial launches; PSLV-C62 anomaly is reputationally significant. [2]
6. Recent Developments (Last 12–18 Months)
- January 2026: PSLV-C62 / EOS-N1 launched from SDSC Sriharikota; anomaly detected in PSLV vehicle during flight. [2]
- February 2026 (approx.): Dr. Jitendra Singh informs Parliament via Q&A; confirms National Level Expert Committee constituted; PSLV fleet grounded pending review; return-to-flight conditional on corrective actions. [3]
- Ongoing: Expert Committee conducting telemetry analysis; ISRO has not yet announced a return-to-flight date (as of June 2026). [3]
- Parallel programme: SSLV (Small Satellite Launch Vehicle) development and launches continue; parliamentary Q&A covered both PSLV and SSLV status simultaneously. [3]
7. Prelims Hooks
- PSLV stands for Polar Satellite Launch Vehicle — operated by ISRO under the Department of Space. [1]
- PSLV has 4 stages: alternating solid (PS1, PS3) and liquid (PS2-Vikas, PS4) propulsion. [1]
- PSLV's primary launch site is Satish Dhawan Space Centre, Sriharikota (Andhra Pradesh). [1]
- PSLV-C37 (February 2017) set a world record by launching 104 satellites in a single mission. [1]
- PSLV-C62 / EOS-N1 is the mission that suffered an anomaly in January 2026. [2]
- A National Level Expert Committee — not a parliamentary committee — was constituted to review the PSLV anomaly. [3]
- The anomaly disclosure was made in Parliament by Dr. Jitendra Singh, MoS for the Prime Minister's Office (which oversees the Department of Space). [3]
- India's first dedicated space law is the Space Activities Act, 2023. [1]
- IN-SPACe (Indian National Space Promotion and Authorisation Centre) was established in 2020 to regulate private space actors. [3]
- NSIL (NewSpace India Ltd.) is ISRO's commercial arm responsible for marketing PSLV launch services. [3]
- PSLV has a payload capacity of ~1,750 kg to SSO in its XL variant. [1]
- EOS stands for Earth Observation Satellite — the series supported by PSLV for agriculture, disaster management, and cartography. [2]
- Department of Space reports directly to the Prime Minister of India (not a line ministry like MoST). [3]
- PSLV variants: Standard, CA (Core Alone), XL, DL, QL — differing in number of strap-on boosters. [1]
8. Mains Relevance
|
Detail |
| GS Paper |
GS-III (Science & Technology — Space; Indigenous Technology) |
|
GS-II (Governance — Parliamentary oversight, accountability of PSUs/autonomous bodies) |
| Syllabus Headings |
GS-III: "Awareness in the fields of Space"; "Indigenization of technology and developing new technology" |
|
GS-II: "Important aspects of governance, transparency and accountability" |
Plausible Mains Question Stems:
- "Examine the significance of PSLV's reliability to India's commercial space ambitions and the implications of the PSLV-C62 anomaly for NSIL's launch manifest." (GS-III, 15 marks)
- "Discuss the institutional mechanisms ISRO employs for failure analysis and return-to-flight certification. How does India's Space Activities Act 2023 strengthen accountability?" (GS-II/III, 15 marks)
- "The Department of Space reports directly to the Prime Minister rather than a line ministry. Critically analyse the governance implications of this structure." (GS-II, 10 marks)
9. Related Topics to Study Next
| Topic |
Connection |
| SSLV (Small Satellite Launch Vehicle) |
Covered in the same parliamentary Q&A; India's next-gen launcher for small payloads |
| IN-SPACe & NSIL |
Institutional ecosystem around PSLV commercial operations; privatisation of launch services |
| Space Activities Act, 2023 |
Enabling legislation for all Indian space activities including liability post-anomaly |
| Chandrayaan-3 / Gaganyaan |
India's flagship missions; PSLV reliability underpins confidence in heavier LVM3 missions |
| Earth Observation Satellites (EOS series) |
The payload series EOS-N1 belongs to; critical for NatDis, agri, mapping |
| GSLV Mk-III / LVM3 |
Heavier sibling; understanding the full Indian launch vehicle family tree |
| India's Commercial Space Policy 2024 |
Policy framework enabling private players, relevant to NSIL's launch contracts |
10. Common Errors / Trap Areas
- Department of Space ≠ Ministry of Science & Technology: DoS reports to the PM, not MoST. Mixing these is a classic trap. [3]
- PSLV-C62 is NOT the first PSLV failure: PSLV-D1 (1993) and PSLV-C39 (2017) had earlier failures. C62 is the third anomaly, not the first. [1]
- "Jitendra Singh" confusion: He holds multiple portfolios (MoS PMO, MoS Personnel, MoS DoNER, MoS Science & Technology). In this context he speaks as MoS PMO/Department of Space, not as MoS Science & Technology. [3]
- Expert Committee ≠ Parliamentary Committee: The body constituted is a technical/scientific National Level Expert Committee, not a Parliamentary Standing Committee or PAC. [3]
- EOS-N1 ≠ EOS-06: These are distinct satellites. EOS-06 was launched on PSLV-C54 (2022); EOS-N1 is the PSLV-C62 payload (2026). Do not conflate them. [2]