Add BEESAT-5...8 to DB

Satellite names

1. BEESAT-5 (DP0BEI)
2. BEESAT-6 (DP0BEJ)
3. BEESAT-7 (DP0BEK)
4. BEESAT-8 (DP0BEL)

Description

The pri­ma­ry mis­sion ob­jec­tive is to demon­strate a new­ly de­vel­oped com­mu­ni­ca­tions sub­sys­tem in the UHF band and an ex­per­i­men­tal GNSS re­ceiv­er. Fur­ther­more, the satel­lites contain a mul­ti­func­tion op­ti­cal at­ti­tude de­ter­mi­na­tion sen­sor and are equipped with cor­ner cube re­flec­tors on all sides for laser rang­ing from ground.

URL: https://www.space.tu-berlin.de/menue/research/current_projects/beesat_5_6_7_8/

Image

https://www.space.tu-berlin.de/fileadmin/fg169/Projects/BEESAT-5_-6_-7_-8/BEESAT-5.png

Transmitter 1

Transmitter Name

TLM

Type

Transceiver

Service

Amateur

• IARU coordination: 796
• ITU filing: TUBSAT

Downlink Frequency

435950000 Hz

Downlink Mode

GMSK (BT=0.5) 1200/2400/4800 Bd

Dowlink Encoding

MobiTUB 3: 3rd revision of a custom protocol based on Mobitex from TU Berlin.

• Specs: https://www.space.tu-berlin.de/menue/amateur_radio/
• SDR decoder: https://git.tu-berlin.de/rft/com/

Preliminary TLE

BEESAT-5 LEOP
1 99730U 21021A   21081.44018519  .00000000  00000-0  25748-3 0  9997
2 99730  97.5685 345.3250 0019866 246.6360  74.5045 15.05349436    04
BEESAT-6 LEOP
1 99729U 21021B   21081.44018519  .00000000  00000-0  25748-3 0  9995
2 99729  97.5685 345.3250 0019866 246.6360  74.5045 15.05349436    02
BEESAT-7 LEOP
1 99728U 21021C   21081.44018519  .00000000  00000-0  25748-3 0  9994
2 99728  97.5685 345.3250 0019866 246.6360  74.5045 15.05349436    01
BEESAT-8 LEOP
1 99727U 21021D   21081.44018519  .00000000  00000-0  25748-3 0  9993
2 99727  97.5685 345.3250 0019866 246.6360  74.5045 15.05349436    00

Launch and tracking

• 2021-03-22 06:07:12 UTC - Launch at Baikonur Cosmodrome
• 2021-03-22 10:33:52 UTC - Separation from upper stage at 38.51°S 12.74°E
• 2021-03-22 10:52:49 UTC - First pass over TU Berlin groundstation
• 2021-03-22 11:03:52 UTC - Activation of telemetry beacon

Due to power budget of the bus and usage of chip antennas the link budget requires a high gain antenna system to receive the signal: EIRP = 22 dBm (150 mW)