Exchange format for the ACTIVE and APEX RTT systems data

Exchange format for the ACTIVE and APEX RTT systems data.

1. File name
CC-nnnnn.wn2 where

        C    -  satellite's code:    AC .. ACTIVE main
                                     AS .. ACTIVE subsatellite (Magion-2)
                                     PP .. APEX main
                                     XX .. APEX subsatellite (Magion-3)
        nnnnn - number of revolution, for ACTIVE five digits, 
                                      for APEX four digits

2. File structure

   Passport     -   526 bytes
   Frame  1     -   526 bytes
   Frame  2     -   526 bytes
   ........     ..............
   Frame  N     -   526 bytes

3. Passport structure

Bytes   Number of           C o n t e n t
          bytes

 1-2       2         number of record ( = 0 )
 3-3       1         number of satellite (24, 25, 2, 3)
 4-5       2         number of revolution
 6-7       2         number of frames
 8-9       2         maximal telemetry voltage (for analogue channels) [mV]
 10-11     2         number of non-zero frames
 12-13     2         number of good frames
 14-18     5         reserve
 19-19     1         code of telemetry station (8..PAN, 7..NEU)
 20-20     1         number of data intervals              (*)
 21-22     2         number of the first frame of the first interval of data
 23-23     1         day            date and time [UT]
 24-24     1         month          of the first frame of the first interval
 25-26     2         year           
 27-27     1         hour
 28-28     1         min
 29-29     1         sec
 30-31     2         msec
 32-42     11        information similar to 21-31 bytes for the second interval
  ...      ..        ......................................
 274-284   11        information similar to 21-31 bytes for
                     the 24-th interval, if present
 285-295   11        information similar to 21-31 bytes for
                     the 25-th interval, if present

4. Telemetry frame structure

Bytes    Number of           C o n t e n t
          bytes 

1-2          2         frame number (1,2,3,..N)
3-3          1         day
4-4          1         month
5-6          2         year                date and time [UT]
7-7          1         hour                   of the frame
8-8          1         min
9-9          1         sec
10-11        2         msec
12-13        2         frame duration [msec]
14-14        1         coding of the frame error and structure: 
                        b0 to b4 =0 ..  no errors
                        b0 - structure error
                        b1 - error of checksum in subframe 0
                        b2 -                               1
                        b3 -                               2
                        b4 -                               3
                       or alternatively: 0 .. no error, 1 .. any error
15-526       512       512 channels  of frame STO (**)

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Notes: All 2-bytes words are located in passport in the following way: b0,b1
Character data are in ASCII code
* - a new data interval is determined by:

change of the acquisition program (ROM/RAM, structure);

change of data bit rate;

large interval of data with error structure

** - data of 512-th parameters are the codes in telemetry units (0-255) and are located according to the description of current RTT TM-frame for each satellite