Changes between Initial Version and Version 1 of Sensors/ATM


Ignore:
Timestamp:
Mar 6, 2009 5:03:33 PM (11 years ago)
Author:
mggr
Comment:

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  • Sensors/ATM

    v1 v1  
     1ATM
     2===
     3
     4ATM comes as raw data on the flight disks and is moved into files by a program called azed.  Each data frame has a 16 bit header (holding the scan number?) then 11 unsigned ints of data.  Note that there are two types of ATM file - ones containing navigation (normally az*000 but not always) and ones containing imagery.
     5
     6There's an apparent byte pattern of "AZSYS001" at the start of the files, at least for 2007 ATM.  I suspect if the data you're looking at is old (early 90s?) it will be different as there was a change to the ATM back then sometime.
     7
     8This is infact a data frame header, but still identifies the file as being ATM. You can only tell a nav file by checking all the records - if they are all nav frames then it is a nav only file.  ATM files have both nav and ATM frames.
     9
     10Samples from 2007 - first 16 bytes of files:
     11{{{
     12azhba000.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
     13azhba001.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
     14azhba002.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
     15azhba003.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
     16azhba004.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
     17azhba005.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
     18azhda000.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
     19azhda001.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
     20azhda002.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
     21azhda003.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
     22azhda004.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
     23azhda005.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
     24azhaa000.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     25azhaa010.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     26azhaa011.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     27azhaa012.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     28azhaa013.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     29azhaa014.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     30azhaa015.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
     31}}}
     32
     33