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Sriharikota2 hours ago
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Isor PSLV-C 61 missions failed due to technical error. In this mission, the EOS-09 Earth Observation satellite should be installed 524 km Sun-Sinchronous Pole orbit.
The ISRO’s PSLV-C 61 mission has failed due to the Indian Space Research Organization. In this mission, the EOS-09 Earth Observation satellite should be installed 524 km Sun-Sinchronous Pole orbit. It was the 101st launch mission of Isra. Isra has formed a committee to find out the reasons for mission failure.
PSLV-C 61 was launched on May 7 from Satish Dhawan Space Center in Sriharikota: 5: 1.
Before going forward in the news, learn about these technical words, which will make the whole news easier to understand:
Polar satellite launch vehicle: PSLV is a trusted rocket in Isra, which launches the satellite in the earth’s orbit, especially the pole and the sun-seas orbit (600-800 km). It is a four -stage (solid and liquid engine) launch vehicle, which is used for remote sensation, communication and scientific missions.
Ground-Lit Strap-on Motor: The rocket has an additional booster engine, which emphasizes the rocket during the launch. They are associated with the main core of rockets like PSLV and gives the energy needed for the elevator-off.
Onboard Instrumentation: They are sensors and equipment on the rocket or satellites, such as Excelroom, Gyroscopa and exchangeable measurements (IMU), which measure the speed, direction, height and other data in real-time. This data is transmitted to the ground station via telemetry, so that the mission status and trees can be monitored.
Telemetry: It is a technique where data (such as speed, height, pressure, orientation) from the rocket or satellite is transmitted to the ground station in real-time via radio signal. This data is necessary for the monitoring and analysis of the mission.
The top line says the rocket speed. At the same time, the bottom line is called Ochike. T and I wrote below, T means trekking and I mean less means instrument.
Ground-based tracking: This is the process where the location, speed and direction of the rocket or satellite is tracked in real-time using radar, antenna and ground stations. It is different from the onboard institutionation data and helps monitor the mission.
Turn off the loop guidance: There is an automatic control system, where the rocket’s onboard computer analyzes real-time data and coordinates the Trezects, Thrust and Orientation. This ensures that the rockets came properly in the orbit without the help of ground control.
Mission starts: Everything is normal
The introduction of PSLV-C 61 was built today from the Satish Dhawan Space Center in Sriharikota at 5:59 in the morning. In the early stages of the launch, everything is going on according to the plan. The performance of the countdown, the first stage ignition, the elevator-off and the performance of solid motors were normal.
Four Ground-Lit Strap-on Motors and the Central Corps played the same way. After that, the ignition of the air-felt strap-on motor was like time and the rocket was moving on its scheduled trees.
The second stage also performed completely normal. It uses the development engine on the liquid fuel. During this period the materials and ground-based tracking data were perfectly matched with each other, it shows that the rocket is gaining its speed and height.
In the early stages of the launch, everything is going on according to the plan.
Where Laps: Third Stage Disruption
The mission problem began when the rocket reached the third stage (PS3), which is a stiff motor. According to Isra, the third phase of ignition was usually in 262.9 seconds.
Everything was visible in the initial data. During this time, the height of the rocket was 344.9 km, the speed was 5.62 km/second and the range was 888.4 km. However, after 376.8 seconds, there was a mess on telemitry data.
Two types of data are analyzed at Isra’s Ground Stations:
- Onboard Instrumentation Data, which fills the rocket’s exchangeable measurement unit (IMU), Acceter and Zeroscopes.
- Ground-based tracking data, which tracks the position of the rocket through the radar and antenna system.
Both of these data sources are shown in the graph, where the green line shows the materials and yellow line tracking data on the ship.
In the early stages of the mission, the green and yellow lines were completely overlap, it shows that the rocket performance is okay. However, in the third phase about 376.8 seconds the two lines began to separate.
Jigjag pattern and development start to appear on the green line and show the data of onboard sensors. At the same time, the yellow line shown in tracking data was saying a different situation. This development was an indication that something was in trouble.
Here the Green Line reflects onboard Instrumentation and Yellow Line Tracking Data. If all the missions are in accordance with the plan, both lines run overlap. Initially, the line was running overlap here, but in the third phase the two lines were separated that reflect the disruption.
Possible factors: Discrimination between Thrust or Data Transmission Disruption
In the third phase, the rocket was in close loop guidance mode, where the onboard computer decided freely on the basis of real-time data.
In this mode, the inspector measuring unit, the satellite system on the global and other sensors control the orientation of the rockets, the thrust and the trees. However, on this mission, the data sent by the onboard system does not match tracking data.
Analysts believe that there may be many possible reasons for this development:
- Censor Filliers: Onboard sensors such as IMU or Axers can take the wrong data as it is defective.
- Algorithm Error: Close loop guidance systems may contain defects in miscusciation or data processing on the itemal algorithm.
- Thrust abnormality: Third phase solid motor pressure can cause drop or nozzle problems, which do not create expected thrust.
- Data Transmission Error: No hassle on the telemetry system, which has not reached the ground station properly.
After this development, the rocket has begun to incorrectly adjust its trendy, which is why it cannot reach its scheduled class. The fourth episode (PS4) was also burned, but then the success of the mission was not possible. The final mission had to be canceled in the middle, and the rocket and satellite were destroyed.
ISRO Chairman: Felia Analysis Committee will identify the factors
Iso Chairman V. Narayanan said that in the third phase the mission was seen on the mission, which could not be set up in the EOS -09 satellite orbit. He said, “We have formed a filler analysis committee to find out the reason for this failure.
This committee will detract telemetry data, onboard system log and ground tracking data analysis. By studying millions of bits of data we will find the right reasons and improve for future missions. “
Israo Cherman said that during the third phase, the pressure of the motor case chamber was reduced, which could not be completed the mission.
Satellite was used in agriculture, forest and disaster management
The EOS-09 satellite was an important organ in Isro’s money monitoring program weighing 1,696.24 kg sent with PSLV rocket. Its purpose was to provide high-resolution images for applications in agriculture, forest and disaster management.
Questions about PSLV’s reliability?
Polar satellite launch vehicle has become the most trusted rocket of Isra. This is called “Workhiers”. Its success rate is about 96%. This rocket has been able to install the orbitals of customers worldwide along with India’s satellite.
Isra has taken an lesson from failure before. For example, after the failure of the EOS-03 mission in 2021, the pressure problem was detected at the Croezenic Stage Tank and the base was improved. This time, the team of Isra will have a complete analysis of the preparation, the launch process and the onboard system before launch.
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