EOS–07 (formerly known as Microsat-2B) is an

Earth observation satellite An Earth observation satellite or Earth remote sensing satellite is a satellite used or designed for Earth observation (EO) from orbit, including spy satellites and similar ones intended for non-military uses such as environmental monitoring, me ...

developed by the

Indian Space Research Organisation The Indian Space Research Organisation (ISRO; ) is the national space agency of India, headquartered in Bengaluru. It operates under the Department of Space (DOS) which is directly overseen by the Prime Minister of India, while the Chairman ...

(ISRO) and launched during the

SSLV-D2 The SSLV-D2 was the second mission of the Small Satellite Launch Vehicle (SSLV). The vehicle carried three payloads: EOS–07, Antaris US Firm named as Janus-01 and AzaadiSAT-2 by SpaceKidz India. Details ISRO launched the Small Satellite Launc ...

mission, the first successful mission of the SSLV rocket. It's a minisatellite designed to accommodate new technology payloads in a quick turn-around time.

Structure and Payloads

It has a cubical structure consisting of six Honeycomb structures. 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 A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of a magnetic field at a particular location. A compass is one such device, o ...

. It has a passive thermal control system with Optical Solar Reflector, Multi-Layer Insulation, Thermal interface material, etc. 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

{{Indian spacecraft Earth observation satellites of India