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Masat-1 2012-006E 1 38081U 12006E 12057.72669255 .00022080 00000-0 59203-3 0 395 2 38081 69.4891 208.8690 0777224 27.7023 336.3319 14.06012681 1864
Name
Callsign
e-mail address
skype contact (if desired)
Location in GPS coordinates
Time of acquisition of signal (UTC) (day:hour:minute:second)
Time of loss of signal (UTC) (day:hour:minute:second)
Frequency of signal (min-max if no Doppler correction was used)
Short description of equipment
Signal to noise ratio interval (min-max dB) or
Signal strength interval (min-max S level)
Qualitative description of radio link (tumbling? abrupt losses?)
CW data (if recieved)
Packets recieved?
Other comments
The satellite’s TX and RX modes operate according to a pre-programmed schedule.
Most of the times the satellite operates with a data rate of 625 bits/sec., according to the following schedule:
In normal mode all subsystems’ data is refreshed with a new value on each pane in the decoding software.
list]
2-GFSK is a 2-state Frequency Shift Keying (0 corresponds to the carrierr frequency, 1, corresponds to the frequency of carrier + deviation), but the modulating signal is not square, but Gaussian-filtered (to improve spectral efficiency and limit the occupied bandwidth). The data rate of the 2-GFSK data packets: 625 or 1250 bits/sec. (can be decoded by the decoding software). The following figure shows the modulating square signal, the Gaussian-filtered modulating signal and the frequency modulated signal (transmitted sequence 010111100010010):
Masat-1 GFSK Transmission
M | T | W | T | F | S | S |
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
6 | 7 | 8 | 9 | 10 | 11 | 12 |
13 | 14 | 15 | 16 | 17 | 18 | 19 |
20 | 21 | 22 | 23 | 24 | 25 | 26 |
27 | 28 | 29 | 30 |