From Oscar News No. 77 1989 May 05 ------------------------------------ Note: Sometimes the "L" block carries WOD too. OSCAR-13's WHOLE ORBIT DATA (WOD) by James Miller G3RUH Regular Oscar-13 PSK telemetry watchers will have noticed that the "K" message block often carries special data which prints like this: K Whole Orbit TLM Data V1.1 Samples: 6 Captured Channel: 72 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkklkkkkk kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkklkkklkkkkkkkkkk Start= 15:42:10 4139 #A417 Last= 08:45:01 4142 #A9C6 Line 1: Samples: [n] specifies the sample interval in MA units (/256) Channel: [n] specifies the telemetry channel number (decimal) Line 2 - 7: 384 sampled values. Range is 0-255, so some values will be unprintable as ASCII. Table is initialised with value 32, i.e. Line 8: Start= hh:mm:ss dddd #oozz Last= hh:mm:ss dddd #oozz These give the day (dddd), time (hh:mm:ss), orbit number (#oo), and MA (#zz) when the capture program was initiated, and similarly for the last point. Day means Amsat Day Number, and 0 = 1978 Jan 01. Time is UTC. Orbit number is in hexadecimal, and only its least significant byte is given. MA is in hexadecimal. Note: Sampling actually occurs on an MA that is exactly divisible by Samples, i.e. when MA MOD SAMPLES = 0 Expanding the example K block into verbose format: PROGRAM - WODdisp V.1.0 (C)1989 J R Miller G3RUH ------- Start Date 1989 May 2 [Tue] 15:42:10 Start Orbit/MA = 676/ 23 End Date 1989 May 5 [Fri] 08:45:01 End Orbit/MA = 681/198 Channel Number is #48 Channel Name is: SUN SENSOR MA 0 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 --------------------------------------------------------------------------- 24 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 120 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 Seven identical lines omitted; beginning MAs 216, 54, 150, 246, 84, 180 114 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 210 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 48 235 235 235 235 235 235 235 235 235 235 236 235 235 235 235 235 144 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 240 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 78 235 235 235 235 235 235 236 235 235 235 236 235 235 235 235 235 174 235 235 235 235 235 32 32 32 32 32 32 32 32 32 32 32 12 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 Five identical lines omitted; beginning MAs 108, 204, 42, 138, 234 72 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 168 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 --------------------------------------------------------------------------- This example shows the Sun sensor value constant at 235 units (-23.8 deg) over several orbits. Note that 235 = #EB, which becomes #6B when the MSB is set to 0, and #6B = ASCII "k", as printed above.