EOS–07

EOS-07
	EOS-07 satellite in deployed configuration, rendering
Names	EOS-07 / Microsat-2B
Mission type	Earth observation
Operator	ISRO
COSPAR ID	2023-019A
SATCAT no.	55562
Website	https://www.isro.gov.in/
Mission duration	Planned: ≈1 year ; Elapsed: 1 year, 8 months, 30 days
Spacecraft properties
Spacecraft	EOS-07
Manufacturer	Indian Space Research Organisation
Launch mass	157 kg (346 lb)
Power	357 watts
Start of mission
Launch date	10 February 2023 03:48 UTC
Rocket	Small Satellite Launch Vehicle, (SSLV-D2)
Launch site	Satish Dhawan Space Centre, First Launch Pad (FLP)
Contractor	Indian Space Research Organisation
Entered service	10 February 2023
Orbital parameters
Reference system	Geocentric orbit
Regime	Polar orbit
Perigee altitude	450 km (280 mi)
Apogee altitude	450 km (280 mi)
Inclination	37.2°
Period	minutes
Instruments
	mmWave Humidity Sounder (MHS), Spectrum Monitoring Payload (SMP)
	Earth observation satellites series

EOS–07 (formerly known as Microsat-2B) is an Earth observation satellite developed by the Indian Space Research Organisation (ISRO) and launched during the SSLV-D2 mission, the first successful mission of the SSLV rocket.^[1] It's a minisatellite designed to accommodate new technology payloads in a quick turn-around time.^[2]^[1]

Structure and Payloads

It has a cubical structure consisting of six Honeycomb structures.^[3] Top and Bottom decks are connected with 4 staggered cross ribs and 4 closing vertical decks. The structure includes a Starsensor (mSS), 4π Sunsensor (4πSS), micro-Inertial Reference Unit (mIRU), and a Magnetometer. It has a passive thermal control system with Optical Solar Reflector, Multi-Layer Insulation, Thermal interface material, etc.^[3] It has 1N Thrusters (1Nms), 0.02Nm Reaction Wheels, and 20 A.m2 Magnetic Torquers powered by 5 kg of hydrazine fuel. The altitude and orbital control system (AOCS) has a pointing accuracy of – 0.1° (3σ) and a drift rate of – 7.5e-4°/s. For power generation, it has solar panels which will be deployed using Frangi bolt actuators. The panels have a power generation of 357 watts. It also has a Li-ion battery of 27.2 Ah capacity. The onboard computer has a MIL STD 1553B protocol for interfacing with other sub-systems. It has a data storage capacity of 32 Gb. The RF system uses S-Band Telemetry Transmitters, S-Band Telecommand Receiver, 12 channel SPS. It has a 15m location accuracy, 0.15 m/s velocity accuracy and an X-Band Data Transmitter.

Payloads

It has two payloads; mmWave Humidity Sounder (MHS) and a Spectrum Monitoring Payload. MHS has 6 water vapor sounding channels with 50rpm scan rate. It weighs 26 kg and requires 55 watt power. The Spectrum Monitoring Payload weighs 13 kg, requires a power~ of 35W, and has a data rate of 2 Mbit/s.

References

^ ^a ^b "Successful flight of Small Satellite Launch Vehicle (SSLV)". Press Information Bureau. 10 February 2023. Archived from the original on 13 February 2023. Retrieved 14 February 2023.
^ "SSLV D2, EOS 07 MISSION" (PDF). isro.gov.in. February 2023. Archived (PDF) from the original on 2023-10-15. Retrieved 2023-11-09.
^ ^a ^b "SSLV-D2/EOS-07 MISSION". www.isro.gov.in. Archived from the original on 2023-08-24. Retrieved 2023-08-24.

[pib-1] "Successful flight of Small Satellite Launch Vehicle (SSLV)". Press Information Bureau. 10 February 2023. Archived from the original on 13 February 2023. Retrieved 14 February 2023.

[brochure-2] "SSLV D2, EOS 07 MISSION" (PDF). isro.gov.in. February 2023. Archived (PDF) from the original on 2023-10-15. Retrieved 2023-11-09.

[EOS-07-3] "SSLV-D2/EOS-07 MISSION". www.isro.gov.in. Archived from the original on 2023-08-24. Retrieved 2023-08-24.

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