SRMSAT

SRMSAT being loaded on the PSLV C-18
SRMSAT being loaded on the PSLV C-18

The SRMSAT is the first mission of Team SRMSAT. The design is made robust enough to support different payload and it is also the mission’s aim to make the SRMSAT as a nanosatellite bus to support future missions. The satellite’s scientific mission was to monitor greenhouse gases above the Indian subcontinent. The development of SRMSAT cost around 1.5 crore rupees. SRMSAT was launched aboard PSLV C-18 at Indian Space Research Organisation (ISRO)’s Satish Dhawan Space Centre at Sriharikota in October 2011. The launch was a multi-payload mission shared with Megha-Tropiques, VesselSat-1 and Jugnu.

Specifications

Students explain the features of SRMSAT
Students explain the features of SRMSAT to university president P. Sathyanarayanan and Chancellor T.R. Pachamuthu in Chennai.

SRMSAT weight 10.4 kilograms and measures 28cm X 28cm X 28cm. The mission has a design life of one year, but is still functional after more than 5 years.
SRMSAT is controlled by a 28.8 MHz Atmel microcontroller. Communication is via Ultra high frequency (UHF), with a downlink at 437.5 MHz providing a data rate of 2.4 kbit/s and an uplink at 145.9 MHz with a 1 kbit/s data rate. Attitude control is via solar cell management system (SCDM), an on-board magnetometer and Global Positioning System (GPS) receiver that provide data for magnetorquer coils which interact with the Earth’s magnetosphere to change the satellite’s orientation.

Parameters

NORAD37841
COSPAR designator2011-058-D
Inclination19.970
RA of A. Node106.259
Eccentricity0.0012093
Argument of Perigee99.676
Revs per day14.10196386
Period1h 42m 06s (102.10 min)
Semi-major axis7 237 km
Perigee x Apogee850 x 867 km
BStar (drag term)0.000000000 1/ER
Mean anomaly260.509
Uplink (MHz)145.900
Downlink (MHz)437.500
Beacon (MHz)437.425
ModeCW
Call signSRMVU
StatusActive
To hear SRMSAT’s transmission in morse code, click on the play button or download here.

To track the satellite’s real time position, click here.