####################################
###  grav_uwts.file.description  ###
####################################
##
## Data Type: Shipboard gravity data - 1 minute interval timeseries
##
## File Name: grav_uwts.[date]  where [date] is date file ends,
##				e.g. grav_uwts.95jan03
##	  or  grav_uwts.[CRUISE] for file covering whole cruise leg,
##				e.g. grav_uwts.WEST09MV
##
## description written January 1995 by S.M.Smith, SIO/GDC (mlvl62)
##
## Mode and Size: ASCII  19 kbytes/day
##
## 
#
#column  1         2         3         4         5         6         7         8
#2345678901234567890123456789012345678901234567890123456789012345678901234567890
#ymmddFhhmmssttttt hhmmssttttt hhmmssttttt hhmmssttttt hhmmssttttt hhmmssttttt 
#
### grav.uwts.<date> file produced by grav_filter
# BGM-3 meter serial #224 Scale factor 4.983188 mgal/count
# BGM-3 zero meter reading: Begin date: 941205 Begin reading: 855964.97 mgal
# BGM-3 zero meter reading:   End date: 950201   End reading: 855966.47 mgal
# field formula type: 1967 GRS
# data bias: stored values = measured gravity in mgal*10 - 1200000
941210g23500036594 23510036601 23520036611 23530036622 23540036637 23550036648 
941210g23560036654 23570036661 23580036670 23590036681 
941211g00000036692 00010036700 00020036705 00030036712 00040036719 00050036726 
941211g00060036732 00070036741 00080036748 00090036754 00100036759 00110036764 
941211g00120036765 00130036766 00140036767 00150036770 00160036771 00170036778 
# note lines with bad data can be commented out and replaced
#41211g00180088888 00190077777 00200036812 00210036819 00220036827 00230036834 
941211g                        00200036812 00210036819 00220036827 00230036834 
941211g00240036844 00250036853 00260036858 00270036867 00280036877 00290036883 
941211g00300036886 00310036892 00320036894 00330036898 00340036900 00350036904 
941211g00360036918 
#
#column  1         2         3         4         5         6         7         8
#2345678901234567890123456789012345678901234567890123456789012345678901234567890
#
# Date (yymmdd) = Year, Month, Day.  Time (hhmmss) = Hour, Minute, Second (GMT)
#
# Flag F (column 7) = g for measured gravity
#
# Up to six time/value pairs follow the date in each record.
#
# Value (t) = measured gravity in milligals x 10 - 1200000
#
# Both time and value of a time/value pair must be blanked out to delete the 
# pair. 
#
# Lines beginning with "#" are comment lines and not processed. Use for header
# information, comments or to delete but preserve bad data.
#
# Exception: the three lines above beginning with "# BGM-3" must be present
#  before the first data record, with proper values substituted for begin/end
#  dates and begin/end Zero Meter Values. (# BGM-3 lines encountered later in
#  the file, i.e. when separate grav_uwts files are cat'ed together, are
#  treated as comments and their contents ignored.)
#
# Format supports time resolution to 1 second but data usually sampled at
# one minute intervals.
#
#end