Latest news with #ISSAR
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First Post
2 days ago
- Science
- First Post
How does Isro save satellites from collision?
The Indian Space Research Organisation (Isro) saved its satellites from collision 11 times in 2024 by performing collision avoidance manoeuvres. read more India saved its satellites from collision 11 times in 2024, according to Isro's Indian Space Situational Assessment Report (ISSAR) report. The Indian Space Research Organisation (Isro) in the report said that it saved six satellites in the low-Earth orbit (LEO) and four in the geostationary orbit (GEO) from collision. The Isro also said that it prevented the Chandrayaan-2 orbiter from a planetary collision. The Isro said that an orbit maintenance manoeuvre was originally scheduled for Chandrayaan-2 on November 26, 2024, but it was advanced to Nov. 11 to mitigate conjunctions with Nasa's Lunar Reconnaissance Orbiter (LRO), which were predicted to occur on Nov. 15-16. STORY CONTINUES BELOW THIS AD The Isro prevents such collisions by performing collision avoidance manoeuvres (CAM). These are planned changes in a spacecraft or a satellite's trajectory in space to avoid running into some other space object, which can be a body in the space, satellites, or debris from other satellites. The Isro performs such manoeuvres after conducting Space Situational Awareness (SSA) assessments to see whether an object in the space is going to be in the close vicinity of a spacecraft or a satellite. Such objects can include space debris, natural objects like asteroids and meteoroids, and energy and particle flux. ALSO READ: From a slow start to a concrete policy, how India has shaped space research with hits and misses Isro's System for Safe and Sustainable Operations Management (IS4OM) functions as the nodal entity for all space sustainability efforts, including SSA assessments and to improve compliance with internationally-recognised guidelines on the long-term sustainability of outer space activities. Isro in the report said that it conducts analyses to predict close approaches by other space objects to Indian space assets. In case of any critical close approach, CAMs are carried out to rule out or minimise the collision risk. Last year, the Isro said that the Combatant Space Operations Center of the US Space Command had issued more than 53,000 alerts Isro's Earth-orbiting satellites. These alerts were analysed using more accurate orbital data from flight dynamics and 11 collision avoidance manoeuvres were conducted — as mentioned above. STORY CONTINUES BELOW THIS AD The Isro released the following graph to show the CAMs conducted in recent years: Cumulative number of collision avoidance manoeuvres (CAMs) performed for Earth-orbiting satellites of Isro till 2024. (Photo: Isro) The number of CAMs was less in 2024 compared to the previous year because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs, according to Isro. Last year, the Isro said, all manoeuvre plans, including those of the CAMs, were subjected to close approach risk analysis to rule out any potential close approach with other neighbouring space objects imminently after the manoeuvres. In doing so, the report said that 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for LEO satellites and on two occasions manoeuvre plans were revised such for GEO satellites.
Time of India
3 days ago
- Science
- Time of India
ISRO averts 10 collisions in space, backs requirement of Space Traffic Management system
The Indian Space Research Organisation (ISRO) in 2024 successfully averted 10 potential collisions involving its satellites. As per the Indian Space Situational Assessment Report (ISSAR) released by the space agency, collision avoidance manoeuvres (CAM) were carried out to avoid damages. The space agency also flagged the increase in space activity across the globe and highlighted the need for an active Space Traffic Management (STM) system. 'The sheer number of close approach alerts indicates the alarmingly rising congestion in space, especially low-Earth orbit,' ISRO said in its report, adding that with the easier access to space through rideshare, coupled with technological advancements, the future space traffic is not likely to show any signs of slowing down. The agency added that spaceflight safety in the future is expected to involve more intensive coordination and cooperation between various spacefaring entities. 'It is desirable that a suitable collaborative framework evolves for meeting STM requirements,' ISRO said. The space agency received more than 53000 alerts by the Combined Space Operations Center (CSpOC), the US–led multinational space operations center for its satellites, which were analysed using data from flight dynamics resulting in 10 anomalies. ISRO carried out six critical manoeuvres in LEO and four in GEO. For Chandrayaan-2 an orbit maintenance manoeuvre was also conducted to mitigate conjunctions with Lunar Reconnaissance Orbiter, a NASA mission launched in 2009. Currently, India has 22 satellites in LEO (Low Earth Orbit) and 31 in GEO (Geo-synchronous Earth Orbit), which are important to protect. In 2024 India undertook five launches from Sriharikota and all of them were successfully placed in their intended orbits. ISRO said the number of CAMs was lesser in 2024 compared to the previous year. 'This is because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs.' The space agency said post the corrections, 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for LEO satellites.
Time of India
3 days ago
- Science
- Time of India
Isro saved satellites from potential collision 10 times in 2024
Photo/Agencies NEW DELHI: Isro successfully performed 10 Collision Avoidance Manoeuvres (CAMs) in 2024 to protect its satellites from potential collision with other objects in space, according to the newly released Indian Space Situational Assessment Report (ISSAR) for 2024. The space agency performs Space Situational Awareness (SSA) activities to protect national space assets from space environmental hazards, such as resident space objects, including space debris, natural objects like asteroids and meteoroids, energy and particle flux. Last year, 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for low earth orbit (LEO) satellites. On two occasions, manoeuvre plans had to be revised to avoid post-manoeuvre conjunctions for Geostationary earth orbit (GEO) satellites, it said. Overall, Isro has carried out 122 CAMs for its earth-orbiting satellites in the last 14 years. The agency said more than 53,000 alerts issued by Combined Space Operations Center of US Space Command for Isro's earth-orbiting satellites were analysed using more accurate orbital data from flight dynamics. Data shows that between 2010 and 2024, 122 CAMs were conducted and a maximum 23 were carried out between 2022 and 2023. Between 2023 and 2024, there were 10 CAMs. 'The number of CAMs was less in 2024 compared to the previous year. This is because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs,' Isro explained. About the return of satellites once they complete their mission, Isro said a total of 31 Indian satellites had re-entered the atmosphere till the end of 2024. In 2024 alone, nine Indian satellites did so. Among them was Cartosat-2, which re-entered the atmosphere on Feb 14, 2024, being Isro's first-ever LEO to be deorbited at end-of-life to reduce its post-mission orbital life from more than 30 years to less than four years. A total of 136 Indian spacecraft, including those from private operators and academic institutions, were launched in Earth-orbit till Dec 31, 2024. The number of operational satellites owned by India stood at 22 in lower earth orbit (LEO) and 31 in geo-synchronous earth orbit (GEO) by 2024 end. In addition, two Indian deep space missions, Chandrayaan-2 Orbiter and Aditya-L1 at Sun-Earth Lagrange's point, were active. Isro said 34 rocket bodies re-entered the Earth's atmosphere till 2024 end, and five of such re-entries took place in 2024.
Time of India
3 days ago
- Science
- Time of India
ISRO averts 10 collisions in space, backs requirement of Space Traffic Management system
The Indian Space Research Organisation ( ISRO ) in 2024 successfully averted 10 potential collisions involving its satellites. As per the Indian Space Situational Assessment Report (ISSAR) released by the space agency, collision avoidance manoeuvres (CAM) were carried out to avoid damages. The space agency also flagged the increase in space activity across the globe and highlighted the need for an active Space Traffic Management (STM) system. 'The sheer number of close approach alerts indicates the alarmingly rising congestion in space, especially low-Earth orbit,' ISRO said in its report, adding that with the easier access to space through rideshare, coupled with technological advancements, the future space traffic is not likely to show any signs of slowing down. The agency added that spaceflight safety in the future is expected to involve more intensive coordination and cooperation between various spacefaring entities. 'It is desirable that a suitable collaborative framework evolves for meeting STM requirements,' ISRO said. by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like Here's The Estimated Cost of a 1-day Gutter Guards Installation HomeBuddy Undo The space agency received more than 53000 alerts by the Combined Space Operations Center (CSpOC), the US–led multinational space operations center for its satellites, which were analysed using data from flight dynamics resulting in 10 anomalies. ISRO carried out six critical manoeuvres in LEO and four in GEO. For Chandrayaan-2 an orbit maintenance manoeuvre was also conducted to mitigate conjunctions with Lunar Reconnaissance Orbiter, a NASA mission launched in 2009. Live Events Currently, India has 22 satellites in LEO (Low Earth Orbit) and 31 in GEO (Geo-synchronous Earth Orbit), which are important to protect. In 2024 India undertook five launches from Sriharikota and all of them were successfully placed in their intended orbits. Discover the stories of your interest Blockchain 5 Stories Cyber-safety 7 Stories Fintech 9 Stories E-comm 9 Stories ML 8 Stories Edtech 6 Stories ISRO said the number of CAMs was lesser in 2024 compared to the previous year. 'This is because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs.' The space agency said post the corrections, 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for LEO satellites.
Time of India
3 days ago
- Science
- Time of India
Globally, 2.9k objects were placed in orbit in 2024; 3.6k added to debris
A dense cluster of defunct satellites and fragmented metal orbits Earth. (AI-generated image) BENGALURU: Globally, 2024 continued to see a significant number of space launches, with 261 attempts and 254 successes, resulting in 2,578 operational satellites and a total of 2,963 objects placed in orbit, although the total objects placed in orbit is slightly lower than the 3,135 objects from 212 launches in 2023. Revealing these details, the Indian Space Situational Assessment Report (ISSAR) for 2024, also said that renewed interest in lunar missions was evident, with five lunar missions launched during the year. However, 2024 also witnessed three significant on-orbit fragmentation events, including the breakup of a Chinese Long March rocket stage (CZ-6A), which alone added approximately 650 catalogued objects to space debris. These events contributed to a net addition of 702 fragmented objects by year's end. In total, 3,665 objects from launches and fragmentation events were added to the space object population. Simultaneously, a record 2,095 catalogued objects re-entered Earth's atmosphere, including 335 Starlink satellites deliberately deorbited. 'This increase in re-entries was influenced by intense solar activity as the peak of Solar Cycle 25 approached, featuring 18 strong (G3), 20 severe (G4), and 2 extreme (G5) geomagnetic storms that accelerated orbital decay,' the report noted. by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like 2025 Top Trending local enterprise accounting software [Click Here] Esseps Learn More Undo Indian endeavors By Dec 31, 2024, India had a total of 136 spacecraft, encompassing government, private, and academic initiatives. The government operated 22 satellites in Low Earth Orbit (LEO) and 31 in Geosynchronous Earth Orbit (GEO). Additionally, two deep space missions—Chandrayaan-2 Orbiter and Aditya-L1 at the Sun-Earth Lagrange point—remained active. The propulsion module of Chandrayaan-3 continued operations in a high Earth orbit after its relocation from lunar orbit in Nov 2023. India conducted five successful launches from Sriharikota: the PSLV-C58 carrying XPoSat, PSLV-C59 carrying Proba-3, PSLV-C60 that launched the SpaDex satellites, GSLV-F14 carrying the Insat-3ds, and the SSLV-D3/EOS-08. Additionally, GSAT-20 and TSAT-1A were launched aboard SpaceX's Falcon-9 from Cape Canaveral. Collectively, these missions added eight Indian satellites, one foreign satellite, and six rocket bodies to orbit. Re-entry & decommissioning Thirty-four Indian rocket bodies re-entered Earth's atmosphere by Dec 2024—five of them in 2024. 'All LVM3 stages have decayed except the one from LVM3 M2 (OneWeb India-1). Only GSLV-F12 and F14 stages remain in orbit,' the report reads. A total of 31 Indian satellites have re-entered so far, with 9 in 2024. Cartosat-2 was the first Isro LEO satellite de-orbited at end-of-life to cut its orbital life from 30 to under four years. Scatsat-1 was deorbited in 12 manoeuvres and passivated on Sept 26, 2024, eight years post-launch. The INS-2B and EOS-7 were also decommissioned before re-entry. Collision avoidance & risk mitigation Isro analysed over 53,000 close approach alerts in 2024. Ten Collision Avoidance Manoeuvres (CAMs) were executed—six in LEO and four in GEO. An additional CAM was performed for Chandrayaan-2, with its orbit manoeuvre advanced to avoid Nasa's LRO. CAMs were fewer than in 2023, thanks to refined analysis and the integration of avoidance within regular orbit manoeuvres. 'In 2024, Isro carried out 681 orbit manoeuvres in LEO, 504 in GEO, 21 in deep space (Chandrayaan-2 and Aditya-L1). Eighty-nine LEO and two GEO manoeuvre plans were revised to avoid post-manoeuvre conjunctions,' the report noted. Also, Launch Vehicle Clearance (COLA) assessments were conducted for all 2024 launches. Only PSLV-C60 was delayed (by 2 mins 15 secs) due to collision risk. All other missions proceeded on schedule. Isro also deorbited its POEM-3 and POEM-4 platforms that carried 9 and 24 payloads, respectively. 'Both upper stages were de-orbited to \~350 km and passivated, limiting their life to around 3 months,' the report noted.
