EOS-09
| EOS-9 during Integration | |
| Names | Radar Imaging Satellite-1B |
|---|---|
| Mission type | Imaging radar |
| Operator | ISRO |
| Website | ISRO PSLV-C61 / EOS-09 Mission |
| Mission duration | 5 years (planned) Failed to orbit |
| Spacecraft properties | |
| Spacecraft | EOS-09 |
| Manufacturer | ISRO |
| Start of mission | |
| Launch date | 18 May 2025, 05:59 IST |
| Rocket | PSLV-C61 |
| Launch site | Satish Dhawan Space Centre, First Launch Pad (FLP) |
| Contractor | ISRO |
| Orbital parameters | |
| Reference system | Geocentric orbit [1] |
| Regime | Sun-synchronous orbit |
| Perigee altitude | 526.7 km (327.3 mi) (planned) |
| Apogee altitude | 543.4 km (337.7 mi) (planned) |
| Inclination | 97.6° |
| Period | 95.2 minutes |
| Instruments | |
| Synthetic Aperture Radar (C-band) (SAR-C) | |
EOS-09 or Earth Observation Satellite-09 (formerly known as RISAT-1B) was an Indian Space Research Organisation radar imaging satellite designed to provide continuous and reliable remote sensing data for operational applications across various sectors.[2] It was intended to be a follow on to RISAT-1 satellite with similar configuration. The satellite was developed by the ISRO and was the seventh in the series of RISAT satellites.[3] [4] [5]
Satellite description
[edit ]Synthetic Aperture Radar (SAR) can be used for Earth observation irrespective of the light and weather conditions of the area being imaged.[6] It complements/supplements data from Resourcesat, Cartosat and RISAT-2B Series.[7] The satellite carries a C-band synthetic-aperture radar (SAR) and has a liftoff mass of 1,710 kg (3,770 lb).[1] The EOS-09 orbit is expected to be in a polar and Sun-synchronous orbit (SSO) at 05:30 AM LTDN, at approximate altitude of 529 km.[8]
Launch Failure
[edit ]The PSLV-C61 mission launched EOS-9 on 18 May 2025 at 5:59 AM IST. The first and second stages performed nominally, however, the third stage experienced an anomaly which resulted in loss of mission. ISRO is investigating the failure.[9] [10]
See also
[edit ]References
[edit ]- ^ a b "PSLV-C52/EOS-04 Mission". ISRO. Archived from the original on 9 February 2022. Retrieved 9 February 2022.
- ^ "EOS-09". ISRO . Archived from the original on 16 May 2025. Retrieved 18 May 2025.
- ^ Krebs, Gunter (8 October 2021). "RISAT 1, 1A, 1B (EOS 04)". Gunter's Space Page. Archived from the original on 26 December 2021. Retrieved 26 December 2021.
- ^ "Unstarred Question No. 4702" (PDF). Lok Sabha . National Informatics Centre. 29 March 2023. Archived from the original (PDF) on 29 March 2023. Retrieved 12 April 2023.
- ^ "Mission Summary - RISAT-1B". CEOS . 2021. Archived from the original on 26 December 2021. Retrieved 26 December 2021.
- ^ Raj, N. Gopal (25 April 2012). "RISAT-1's radar can see through clouds and work in darkness". The Hindu. Chennai, India.
- ^ "PSLV-C52/EOS-04 Brochure - ISRO". www.isro.gov.in. Archived from the original on 9 February 2022. Retrieved 17 February 2022.
- ^ Reddy, O.V. Raghav (3 February 2016). "Future Earth Observation Missions of ISRO, NRSC User Interaction Meet 2016" (PDF). Archived from the original (PDF) on 3 February 2017.
- ^ "EOS-09 mission unsuccessful, will begin technical analysis, says ISRO chief - The Economic Times". m.economictimes.com. Retrieved 18 May 2025.
- ^ ISRO Official (17 May 2025). ISRO's 101st Launch | PSLV-C61 / EOS-09 | 18 May 2025 . Retrieved 18 May 2025 – via YouTube.
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