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The Hindu
18-05-2025
- Science
- The Hindu
PSLV-C61/EOS-09 mission could not be accomplished: ISRO
The Indian Space Research Organisation (ISRO) could not accomplish its 101st launch, the PSLV-C61/EOS-09 mission, on Sunday (May 18, 2025). Minutes after PSLV-C61 with the EOS-09 earth observation satellite lifted off from the Satish Dhawan Space Centre in Sriharikota at 5:59 a.m., the space agency said that the mission could not be accomplished due to an 'observation' in the third stage of the launch vehicle. Some 17 minutes after lift off, the ISRO's PSLV rocket was to place the satellite into a Sun Synchronous Polar Orbit (SSPO). However the mission could not be accomplished. 'Today from Sriharikota the PSLV-C61/EOS-09 mission was targeted. the PSLV is a four stage vehicle and the second stage performance was quite normal. The third stage motor started perfectly but during the functioning of the third stage we are seeing an observation and the mission could not be accomplished. After analysis we shall come back,' ISRO chairman V. Narayanan said. Today 101st launch was attempted, PSLV-C61 performance was normal till 2nd stage. Due to an observation in 3rd stage, the mission could not be accomplished. — ISRO (@isro) May 18, 2025 'Today 101st launch was attempted, PSLV-C61 performance was normal till 2nd stage. Due to an observation in 3rd stage, the mission could not be accomplished,' ISRO posted on X. The EOS-09 is a repeat of EOS-04, designed with the mission objective to ensure remote sensing data for the user community engaged in operational applications and to improve the frequency of observation. The space agency said that the spacecraft is configured using ISRO's RISAT-1 heritage bus, with most of the functional requirements of the Synthetic Aperture Radar (SAR) payload and the bus platform systems derived from the earlier ISRO missions. The satellite weighing 1696.24 kg carries a SAR payload capable of providing images for various earth observation applications under all-weather conditions. The EOS-09 is designed to provide continuous and reliable remote sensing data for operational applications across various sectors and has a mission life of five years. The PSLV-C61 was the 63rd flight of the Polar Satellite Launch Vehicle and the 27th in the PSLV-XL configuration.
India.com
18-05-2025
- Science
- India.com
Setback for ISRO as EOS-09 launch fails due to 3rd-stage anomaly Sriharikota
PSLV-C61- Image- ISRO X The Indian Space Research Organisation (ISRO) on Sunday suffered a setback as its 101st mission, PSLV-C61 carrying the EOS-09 satellite, faced a technical malfunction in the launch vehicle. The malfunction led to the mission failure, and the satellite could not be successfully deployed. The indigenous PSLV, or Polar Satellite Launch Vehicle — PSLV-C61 — lifted off from the Satish Dhawan Space Centre in Sriharikota with the aim of placing EOS-09 into a Sun Synchronous Polar Orbit (SSPO). While the first and second stages of the launch vehicle performed normally, ISRO Chairman Dr V. Narayanan said that an unexpected issue arose during the third stage, preventing the successful deployment of the satellite. The ISRO Chief said, 'Today, we attempted the 101st launch from Sriharikota, the PSLV-C61 carrying the EOS-09 mission. The PSLV is a four-stage launch vehicle, and its performance was normal up to the second stage. The third stage motor ignited perfectly; however, during its operation, an anomaly was observed, and the mission could not be completed successfully…' 'We will come back after analysis,' he further said. ISRO also posted an update on X, stating: 'Today 101st launch was attempted, PSLV-C61 performance was normal till 2nd stage. Due to an observation in 3rd stage, the mission could not be accomplished.' The third stage of the PSLV is a solid rocket motor designed to provide high thrust during the upper atmosphere phase of the flight, delivering a maximum thrust of 240 kilonewtons. It plays a crucial role in placing the satellite into its intended orbit. The EOS-09 was designed to provide continuous and reliable remote sensing data for operational applications across various sectors, ranging from border surveillance and national security to agriculture, forestry, flood monitoring, and disaster management. For the mission, PSLV carried a 1,710 kg satellite into a sun-synchronous orbit to ensure consistent lighting for Earth observation. The mission was also meant to promote sustainability and carry out responsible space operations. EOS-09 was a repeat satellite similar to EOS-04, launched in 2022, that was designed with the mission objective to ensure remote sensing data for the user community engaged in operational applications and to improve the frequency of observation.
Hindustan Times
18-05-2025
- Science
- Hindustan Times
Why did EOS-09 satellite mission fail? ISRO reveals initial observation
After taking off at the scheduled time of 5.59 am on Sunday, the 101st launch of the Indian Space Research Organisation (ISRO) failed mid-flight during its third stage, just minutes after the launch. ISRO's otherwise reliable PSLV C61 rocket launched from Satish Dhawan Space Centre in Sriharikota with EOS 09, an earth observation satellite, onboard. The mission was to carry the Earth observation satellite into a Sun Synchronous Polar Orbit (SSPO). However, the launch suffered a technical glitch during the third stage of PSLV's flight and failed. Also read: Huge Mexican Navy training ship with 200 people on board collides with Brooklyn Bridge, shocking videos surface 'On 18th May 2025, the 101st launch was attempted, PSLV-C61 performance was normal till the 2nd stage. Due to an observation in the 3rd stage, the mission could not be accomplished,' said the space agency. According to ISRO's Chairman V Narayanan, the Polar Satellite Launch Vehicle is a 4-stage rocket, and the first two stages were normal. However, during the third stage, there was a 'fall in the chamber pressure of the motor case' which caused the mission failure. Also read: EOS-09 mission: What ISRO said on the failed satellite launch "Today, we targeted the 101st launch from Sriharikota, the PSLVC61 EOS-09 mission. The PSLV is a four-stage vehicle, and up to the second stage, the performance was normal. The third stage motor started perfectly, but during the functioning of the third stage, we are seeing an observation," Narayanan said. "...and the motor pressure--there was a fall in the chamber pressure of the motor case, and the mission could not be accomplished. We are studying the entire performance, we shall come back at the earliest," he added, according to a PTI report. EOS-09 is a repeat satellite of EOS-04, designed with the mission objective to ensure remote sensing data for the user community engaged in operational applications and to improve the frequency of observation, according to ISRO. The mission was ISRO's 101 launch. Had the mission been successful, the Orbit Change Thrusters (OCT) would have been used to reduce the altitude of the PS4 stage, followed by passivation to limit its orbital life after the deployment of EOS-09. The mission carried a Synthetic Aperture Radar (SAR) payload capable of providing images for various earth observation applications under all-weather conditions.
Hans India
18-05-2025
- Science
- Hans India
ISRO's EOS-09 launch fails due to 3rd-stage anomaly
Sriharikota (Andhra Pradesh): The Indian Space Research Organisation (ISRO) on Sunday suffered a setback as its 101st mission, PSLV-C61 carrying the EOS-09 satellite, faced a technical malfunction in the launch vehicle. The malfunction led to the mission failure, and the satellite could not be successfully deployed. The indigenous PSLV, or Polar Satellite Launch Vehicle -- PSLV-C61 -- lifted off from the Satish Dhawan Space Centre in Sriharikota with the aim of placing EOS-09 into a Sun Synchronous Polar Orbit (SSPO). While the first and second stages of the launch vehicle performed normally, ISRO Chairman Dr V. Narayanan said that an unexpected issue arose during the third stage, preventing the successful deployment of the satellite. The ISRO Chief said, "Today, we attempted the 101st launch from Sriharikota, the PSLV-C61 carrying the EOS-09 mission. The PSLV is a four-stage launch vehicle, and its performance was normal up to the second stage. The third stage motor ignited perfectly; however, during its operation, an anomaly was observed, and the mission could not be completed successfully..." "We will come back after analysis," he further said. ISRO also posted an update on X, stating: "Today 101st launch was attempted, PSLV-C61 performance was normal till 2nd stage. Due to an observation in 3rd stage, the mission could not be accomplished." The third stage of the PSLV is a solid rocket motor designed to provide high thrust during the upper atmosphere phase of the flight, delivering a maximum thrust of 240 kilonewtons. It plays a crucial role in placing the satellite into its intended orbit. The EOS-09 was designed to provide continuous and reliable remote sensing data for operational applications across various sectors, ranging from border surveillance and national security to agriculture, forestry, flood monitoring, and disaster management. For the mission, PSLV carried a 1,710 kg satellite into a sun-synchronous orbit to ensure consistent lighting for Earth observation. The mission was also meant to promote sustainability and carry out responsible space operations. EOS-09 was a repeat satellite similar to EOS-04, launched in 2022, that was designed with the mission objective to ensure remote sensing data for the user community engaged in operational applications and to improve the frequency of observation.
Economic Times
18-05-2025
- Science
- Economic Times
PSLV-C61 launch setback: ISRO Chief cites anomaly in third stage, mission unsuccessful
ISRO Chief V Narayanan confirmed that the PSLV-C61 mission could not be accomplished due to an issue observed during the third stage of the rocket's flight. The launch, which took place from Sriharikota, was expected to place the EOS-09 satellite into a Sun Synchronous Polar Orbit. However, a deviation during the third stage led to mission failure. Narayanan stated that detailed analysis is underway and further updates will be provided after a thorough investigation. Show more 14:32 02:58 10:00 02:11 02:17 03:01 03:51 05:06 05:32 03:03 04:15 02:36 03:13 03:08 03:49 02:21 09:06 02:10 16:50 04:22 03:03 03:13 02:03 06:26 03:54 10:55 03:31 02:15 24:28 04:28 06:30 02:02 50:21 03:19
