("*" is out of time order)
  #filename                  datestr         startdd     enddd     gapsecs   bin   blank   Nbins   ping    medens PingsPerProf numprofs
   Collins_PtSur_Ridge005_000000.LTA 2009/09/22 14:35:58   264.6083   264.7125       0s     8m     8m      80   bb  /bt    300.43s       82      31
   Collins_PtSur_Ridge006_000000.LTA 2009/09/22 17:07:45   264.7137   264.9672     106s     8m     8m      80   bb  /--    300.59s      163      74
   Collins_PtSur_Ridge007_000000.LTA 2009/09/22 23:13:33   264.9677   265.0372      47s     8m     8m      80   bb  /bt    298.89s       86      21


=== GLOSSARY ===
datestr     : date of data start (convert to startdd)
startdd     : floating point decimal day of data start (Jan 1 noon UTC = 0.5)
enddd       : floating point decimal day of data end (Jan 1 noon UTC = 0.5)
gapsecs     : instrument setting: time gap in seconds between this and the previous file 
bin         : instrument setting: bin size in meters
blank       : instrument setting: size of blank (meters)
Nbins       : instrument setting: number of bins
ping        : broadband, narrowband, bottomtrack
medens      : estimated time duration of profiles in secondsPingsPerProf: number of pings in the profile (numpings=1 for ENR,ENS,ENX)
numprofs    : number of averaged profiles in the file
====

NOTE ABOUT NUMBER OF PINGS PER AVERAGE ("PingsPerProf")
LTA and STA data are VmDAS "Long Term Average" and "Short Term Average", respectively.
Only the first ensemble average contains a value for "number of pings per ensemble".
If the instrument was set to ping only when receiving a synchronizing pulse,
(commonly called "triggering"), then the number of pings for each ensemble is unknown.
Because VmDAS can get "stalled", the first ensemble might not be a good representation.
You are advised to look at the *.ENR data to determine time between pings
... or, to have more control, and get a better dataset, reprocess from ENR.
----------------------

Files are in ascii order: also already in time order
all data from instrument "Ocean Surveyor Broadband/Narrowband ADCP"
all files come from os75

----------


instrument frequency is 75
beam angle is 30
transducer angle (EA) was set as 1.180

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ensemble length = 300 sec (+/- 10sec)

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Heading Source information comes from *.VMO files;
Duplicate entries with different values require further investigation:


HeadingSource(0:adcp,1:navHDT,2:navHDG,3:navPRDID,4:manual)=1
NMEAPortForHeadingSource=1
EnableBackupHeadingSource=TRUE
BackupHeadingSource(0:adcp,1:navHDT,2:navHDG,3:navPRDID,4:manual,5:PASHR,6:PASHR,ATT,7:PASHR,AT2)=8
NMEAPortForBackupHeadingSource=2

----------

EnableGGASource=TRUE
NmeaPortForGGASource=3

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N1R files include these messages:
[['$HEHDT']]

N2R files include these messages:
[['$GPGGA', '$GPHDT', '$PASHR,AT2', '$PASHR,ATT', '$PASHR,POS']]

N3R files include these messages:
[['$GPGGA', '$GPGLL']]

----------