BeeSAT

BeeSAT-1

Berlin Experimental Educational Satellite, Technical University of Berlin.

Mission

beesat-1BEESAT (Berlin Experimental and Educational Satellite) is a picosatellite project at TU Berlin. The main objective is the in-Orbit-Verification of miniaturized reaction wheels.

Downlink

435.950 MHz FM 4k8 GMSK 0.5W, Mobitex

Up- and downlink with picosatellites of the BEESAT series is established by half-duplex GMSK modulated narrow-band radio at 435.950 MHz. The standard baudrate is 4800 bps but can be switched to 9800 bps for increased channel capacity at higher elevations. Each transmission at the higher baudrate is announced by a small 4800 bps header to allow for adaptive receiver re-configuration. The output power of the satellites is 27 dBm (0.5 W) using quarter-wave monopole antennas with toroidal radiation pattern.

Call

DP0BEE

Status

Deployed and active – CW beacon not active and telemetry only over Europe.

BeeSAT-2

BeeSAT ModelMission

BeeSAT is a Pico satellite project at the Technical University of Berlin. The main objective of the project is the verification of newly developed space, miniaturized reaction wheels for Pico satellites and other technologies. With the on-board camera images should be taken from the surface and then transmitted to the ground station for analysis. It also serves as an additional means to verify the position control. A sensor with 640 by 480 pixels is used before which sits a Bayer mosaic filter. The color depth is 8 bits per component, and the images are compressed with variable compression ratio. BeeSAT (c) TUB / ILR

With an edge length of just ten centimeters and a total mass of one kilogram BeeSAT contains three reaction wheels that were developed as part of the German Aerospace Center (DLR) funded project in collaboration with industry, other advanced modules that to be used for the first time in space. This includes a powerful and redundant on-board computer for Pico satellites. The software runs on a comprehensive flight by the Fraunhofer Institute for Computer Architecture and Software Technology (FIRST) provisioned operating system that is used successfully since 2001 in the DLR BIRD microsatellite and has been adapted for Pico satellite applications. The position control of the reaction wheels in addition BeeSAT uses a highly integrated system newly developed sun sensors, magnetic field sensors, solenoids, and sensors that measure the rotation rate. These components are controlled by an expensive position control software can also determine the web position onboard. Thus it is possible, regarding the communication to increase the autonomy of the satellites and ground stations to reduce operating expenses.

Up- and downlink with Pico satellites of the BeeSAT series is established by half-duplex GMSK modulated narrow-band radio at 435.9500 MHz The standard baud rate is 4800 bps but can be switched to 9600 bps for increased channel capacity at higher elevations. Each transmission at the higher baud rate is announced by a small 4800 bps header to allow for adaptive receiver re-configuration. The output power of the satellites is 27 dBm (0.5 W) using quarter-wave monopole antennas with toroid radiation pattern.

Orbital parameters

Name                 BeeSAT-2
NORAD                39136
COSPAR designation   2013-015-G
Inclination          64.869
RA of A. Node        176.112
Eccentricity         0.0034096
Argument of Perigee  288.730
Revs per day         15.05610423
Period               1h 35m 38s (95.63 min)
Semi-major axis      6 928 km
Perigee x Apogee     526 x 573 km
BStar (drag term)    0.000482330 1/ER
Mean anomaly         71.013

Downlink

435.950 MHz FM CW or 4k8/9k6 GMSK 0.5W

Call

DP0BEF

Preliminary TLE

BEESAT-2
1 99999U BEESAT-2 13111.50000000 -.00000022  00000-0 -18943-5 0 00009
2 99999 065.0052 026.5594 0011818 218.6713 261.0081 14.97601851000171

Status

Deployed and active

After the launch of Bion-M1 at April 19 at 10:00 UTC. We have to wait until Bion-M1 performs an orbital maneuver to reach a circular orbit at 575 km altitude only then the three CubeSats will separate, this will probably be after 32 Orbits (21/04/2013 at about 11:00 UTC). Unfortunately, so far we have no information about the exact date of separation. The sequence of separation with 16 second intervals is as follows: BeeSAT-3, SOMP, BeeSAT-2.

Cubesats Launchpods

BeeSAT-3

BeeSAT-3 ModelMission

BeeSAT is a Pico satellite project at the Technical University of Berlin. The main objective of the project is the verification of newly developed space, miniaturized reaction wheels for Pico satellites and other technologies. With the on-board camera images should be taken from the surface and then transmitted to the ground station for analysis. It also serves as an additional means to verify the position control. A sensor with 640 by 480 pixels is used before which sits a Bayer mosaic filter. The color depth is 8 bits per component, and the images are compressed with variable compression ratio. BeeSAT (c) TUB / ILR

With an edge length of just ten centimeters and a total mass of one kilogram BeeSAT contains three reaction wheels that were developed as part of the German Aerospace Center (DLR) funded project in collaboration with industry, other advanced modules that to be used for the first time in space. This includes a powerful and redundant on-board computer for Pico satellites. The software runs on a comprehensive flight by the Fraunhofer Institute for Computer Architecture and Software Technology (FIRST) provisioned operating system that is used successfully since 2001 in the DLR BIRD microsatellite and has been adapted for Pico satellite applications. The position control of the reaction wheels in addition BeeSAT uses a highly integrated system newly developed sun sensors, magnetic field sensors, solenoids, and sensors that measure the rotation rate. These components are controlled by an expensive position control software can also determine the web position onboard. Thus it is possible, regarding the communication to increase the autonomy of the satellites and ground stations to reduce operating expenses.

Up- and downlink with Pico satellites of the BeeSAT series is established by half-duplex GMSK modulated narrow-band radio at 435.9500 MHz The standard baud rate is 4800 bps but can be switched to 9600 bps for increased channel capacity at higher elevations. Each transmission at the higher baud rate is announced by a small 4800 bps header to allow for adaptive receiver re-configuration. The output power of the satellites is 27 dBm (0.5 W) using quarter-wave monopole antennas with toroid radiation pattern.

Orbital parameters

Name                 BeeSAT-3
NORAD                39134
COSPAR designation   2013-015-E
Inclination          64.866
RA of A. Node        173.324
Eccentricity         0.0033812
Argument of Perigee  289.104
Revs per day         15.06379776
Period               1h 35m 35s (95.58 min)
Semi-major axis      6 925 km
Perigee x Apogee     524 x 571 km
BStar (drag term)    0.000586530 1/ER
Mean anomaly         70.648

Downlink

435.950 MHz FM 4k8/9k6 GMSK 0.5W

Call

DP0BEG

Preliminary TLE

BEESAT-3
1 99998U BEESAT-3 13111.50000000 -.00000022  00000-0 -18943-5 0 00009
2 99998 065.0052 026.5594 0011818 218.6713 261.0081 14.97601851000170

Status

Not heard. After the launch of Bion-M1 at April 19 at 10:00 UTC. We have to wait until Bion-M1 performs an orbital maneuver to reach a circular orbit at 575 km altitude only then the three CubeSats will separate, this will probably be after 32 Orbits (21/04/2013 at about 11:00 UTC). Unfortunately, so far we have no information about the exact date of separation. The sequence of separation with 16 second intervals is as follows: BeeSAT-3, SOMP, BeeSAT-2.

Deployed

Cubesats Launchpods


Homepage and other references:

Satellite homepage
BeeSAT Wiki page
Mission information