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POSMVRead.py

  • created: May 2018

  • version 1.0.

  • by: [email protected]

  • description: python module to read an Applanix .000 binary file

  • notes: See main at end of script for example how to use this

  • based on ICD file version 4

  • developed for Python version 3.4

  • 2DO

  • decode heave pitch roll into GG attitude file format (problem! file format is not described)

  • DONE

  • decode positions from group 1 to csv

  • decode true heave from group 111

  • decode C_29 marinestar

  • decode C_20 installation

  • test the file name for the GPS week

  • determine the GPS week so we can provide correct time stamps

  • basic loop through the file reading the header and skipping the data

  • core loop

  • MESSAGE 56 does not change in terms throughout the file of timestamp or date. All messages are identical

Time Of Week

  • test the group 11,12,13 message for GPS week (aux GPS)
  • test the group 3 message for GPS week (primary GPS)
  • test the NMEA strings for GPS week

##GROUPS## 0 - 99 POS Core User data groups 100 - 199 POS MV User data groups 200 - 299 POS AV User data groups 300 - 399 POS TG User data groups 400 - 499 POS LV User data groups 500 - 599 POS LS User data groups 600 - 699 POS SV User data groups 700 - 799 POS MC User data groups 800 - 9999 Reserved 10000 - 10099 POS Core Raw data groups 10100 - 10199 POS MV Raw data groups 10200 - 10299 POS AV Raw data groups 10300 - 10399 POS TG Raw data groups 10400 - 10499 POS LV Raw data groups 10500 - 10599 POS LS Raw data groups 10600 - 10699 POS SV Raw data groups 10700 - 10799 POS MC Raw data groups 10800 - 19999 Reserved 20000 POS Core User diagnostic group 20001 - 20099 POS Core Proprietary diagnostic groups 20100 POS MV User diagnostic group

Data Type Conversions from POS to Python:: https://docs.python.org/2/library/struct.html * ALL types to python struct types * signed char = 1 byte = "b" * unsigned char = 1 byte = "B"

* signed int 4 bytes 				= "i"
* UNsigned int 4 bytes 				= "I"

* signed long int 4 bytes 			= "l"
* UNsigned long int 4 bytes 		= "L"

* signed short integer 2 bytes 		= "h"
* UNsigned short integer 2 bytes 	= "H"

* double = 8 bytes 					= "d"
* float = 4 bytes 					= "f"

* char = 1 byte 					= "c"
* string = n bytes 					= "s"