Changes between Initial Version and Version 1 of Sensors/ATM

Timestamp:

Mar 6, 2009, 5:03:33 PM (17 years ago)

Author:

mggr

Comment:

--

Sensors/ATM

@@ +1 @@
+ATM
+===
+
+ATM 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.
+
+There'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.
+
+This 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.
+
+Samples from 2007 - first 16 bytes of files:
+{{{
+azhba000.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
+azhba001.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
+azhba002.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
+azhba003.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
+azhba004.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
+azhba005.130    00000000  41 5a 53 59 53 30 30 31  6e 40 32 01 5f 19 01 00  |AZSYS001n@2._...|
+azhda000.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
+azhda001.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
+azhda002.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
+azhda003.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
+azhda004.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
+azhda005.166    00000000  41 5a 53 59 53 30 30 31  d7 40 32 01 ed 47 01 00  |AZSYS001.@2..G..|
+azhaa000.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+azhaa010.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+azhaa011.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+azhaa012.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+azhaa013.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+azhaa014.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+azhaa015.254    00000000  41 5a 53 59 53 30 30 31  ff 41 32 01 ed 13 01 00  |AZSYS001.A2.....|
+}}}
+
+