On-Board Computer or On-Board Data Handling (OBC/OBDH) has an important role as a manager for data housekeeping and communication handling between OBC/OBDH to its TTC (Telemetry and Telecommand) and EPS (Electronic Power System) subsystems in the satellite system. In order to operate according to the satellite sequence, the RTOS (Real-Time Operating System) is implemented on the UGMSat-1. The CooCox CoOS is used as an RTOS, which is has three tasks which are Condition-Check, Housekeeping, and Communication Task. The highest priority among the tasks on the system is Communication Task. The experiment proves that three tasks can run well with the time cycle of 2.034, 30.047, and 1.017 seconds for Condition-Check, Housekeeping, and Communication task respectively. The result of overall experiments shows that the OBC/OBDH can manage data packets and sent them to Ground Station.

1.
Haryono
, “On-Board Data Handling (OBDH) for Small Satellite: Design and Implementation”, in
Sixth PG Course in Satellite Communications
,
Dehradun
,
2009
.
2.
B. P.
Leksono
,
I.
Setiawan
, and
B.
Setiyono
, “Penerapan Real Time Operating Systems (RTOS) pada Mikrokontroler AVR (Studi Kasus ChibiOS/RT)”, in Thesis Seminar,
Electronics Engineering Department, Faculty of Engineering, University of Diponegoro
,
2010
3.
B.
Rajulu
,
S.
Dasiga
, and
N. R.
Iyer
, “
Open source RTOS implementation for the on-board computer (OBC) in STUDSAT-2
”, in
2014 IEEE Aerospace Conference
,
2014
, pp.
1
13
.
4.
K.
Lamichhane
,
M.
Kiran
,
T.
Kannan
,
D.
Saha
,
H. G.
Ranjith
, and
S.
Sandya
, “
Embedded RTOS implementation for Twin Nano-satellite STUDSAT-2
,” in
2015 IEEE Metrology for Aerospace (MetroAeroSpace)
,
2015
, pp.
541
546
.
5.
C.
Nagarajan
,
K.
Kinger
,
F.
Haider
, and
R.
Agarwal
, “
Performance analysis of micrium RTOS in the computer of a nano-satellite
,” in
2015 IEEE Aerospace Conference
,
2015
, pp.
1
9
.
6.
T. K.
Priyambodo
,
A. E.
Putra
,
M.
Asvial
,
R. E.
Poetro
,
G.
Hendrantoro
,
E.
Pitowarno
,
S.
Kuswadi
,
G. S.
Prabowo
, and
A.
Nugroho
, A., “
IiNUSAT-1: The 1st Indonesian inter-university nano-satellite for research and education
,” in
2014 IEEE International Conference on Aerospace Electronics and Remote Sensing Technology
,
2014
, pp.
114
120
.
7.
A. E.
Putra
,
B. A. A.
Sumbodo
,
C.
Atmaji
, and
M. S. H.
Ahmad
, “
Purwarupa On-Board Data Handling (OBDH) berbasis Mikrokontroler LPC1769 untuk satelit IiNUSAT-1
”, in
13th Proceeding of Seminar on Intelligent Technology and Its Applications (SITIA 2012)
,
ITS, Surabaya
,
2012
.
This content is only available via PDF.