#!/usr/bin/python
#
'''
************************************************************************* 
PRE-PROCESSING OF GRAVITY DATA
EXTRACT AND RE-FORMAT DATA FROM NAVLOG FILE

Example input line:
	20:50:57 08.08.2008,  610251.9206,8254559.5161,  074°21.041857',  018°39.827384',    46.6300,  10102.0200,     0.0000
	
Example desired output line:
	08.08.2008 20:50:57 074 21.041857' 018 39.827384' 46.6300 10102.0200 0.0000


	
Program version:
  ------------------------------------------
  Ver. Date          By   Description
  ------------------------------------------
  0.1  27 Oct 2009  O.M. Initial version  


Dept. of Earth Science
University of Bergen
Norway
************************************************************************* 
'''


from string import split, replace
from sys import argv, exit

# Give name of input file on command line
# What you write on command line is available in "argv" array
# First verify that file name is present; in that case "argv" contains
# two elements - the name of the script itself in first posistion,
# and the name of the input data file in the second position.

if len(argv) <> 2:
	print "Need name of input file as argument"
	exit(-1)

FileName = argv[1]    # Now get second element (arrays start indexing from zero)

f = open(FileName)							# Open input file.

#--   Loop over all lines in input file

for line in f:								# Loop over all lines in input file.
	
	if line[0].isdigit():					# First ensure line starts with digit - get rid of comments that way
		#print line,
		line = line.replace(',','')			# Get rid of all ',' characters by replacing them with '' (nothing)
		s = line.split()					# s will be an array holding all individual items on line
		date         = s[1]					# no parameter to split method, so whitespace used as element separator
		time         = s[0]
		lat          = s[3]
		lon          = s[4]
		depth        = s[5]
		gravity      = s[6]
		magnetometer = s[7]
		#print '------------'
		#print line,
		#---- We need to split lat/long on the degree symbol, which has ASCII code 0xb0 
		#---- (used Midnight Commander on Linux box to examine content of file as hex characters)
		
		print date, time, \
		      lat.split(chr(0xb0))[0], lat.split(chr(0xb0))[1], \
		      lon.split(chr(0xb0))[0], lon.split(chr(0xb0))[1], \
			  depth, gravity, magnetometer
			  #----  Note that "\" is line continuation character

f.close()