R/V Atlantis Calliope metadata file
Tue 05/Jul/2005 23:11:26
Current time zone: GMT Standard Time
==================================================

Depth (12 kHz)  ( Depth12)

12 kHz depth (meters) from sea surface obtained by Knudsen bathymetry system.
See Knudsen Bathymetry information for sound spped and transducer depth corrections;
normally based on 1500 m/s sound speed & corrected for 5.95 meter (19.5 ft) transducer depth.
__________________________________________________

Depth (3.5 kHz)  ( Depth35)

3.5 kHz depth (meters) to sea surface obtained from Knudsen bathymetry system.
See Knudsen Bathymetry information for sound spped and transducer depth corrections;
normally based on 1500 m/s sound speed & corrected for 5.95 meter (19.5 ft) transducer depth.
__________________________________________________

GPS Navigation data (GPS)
  Complete NMEA data output from the primary GPS receiver.

  The single digit following the position
  information in the GPS_GGA data string indicates the type of GPS fix as follows:
  0=No valid fix; 1=Standard; 2=Differential; 3=P-Code

  NMEA GPS_GGA data sentence:  Header , UTC of position, Latitude, N/S, Longitude, E/W,
  Quality indicator, Number of satellites in use, Horizontal dilution, Altitude, M (meters),
  Geoidal seperation, M (meters), Age of differential data (secs), Differential reference station I.D. * checksum.

  The single digit following the position information (quality indicator) indicates the type of position fix:
  0=No valid fix; 1=Standard; 2=Differential; 3=P-Code.

  NMEA GPS-VTG data sentence:  Header, Course, T (degrees true), Course, M (magnetic), 
  Speed, N (knots), Speed, K (km/hr) * checksum.

__________________________________________________

GPS course over ground (GPS_COG)

Course over ground (true) obtained from NMEA GPS_VTG
data sentence.

NMEA GPS-VTG data sentence:  Header, Course, T (degrees
true), Course, M (magnetic), Speed, N (knots), Speed,
K (km/hr) * checksum.

__________________________________________________

GPS speed over ground (GPS_SOG)
Speed over ground (knots) obtained from NMEA GPS_VTG
data sentence.

NMEA GPS-VTG data sentence:  Header, Course, T (degrees
true), Course, M (magnetic), Speed, N (knots), Speed,
K (km/hr) * checksum.


__________________________________________________

GPS type (GPS_TYPE)
GPS position type (Std, Diff, P-Code)

  GPS position type indicator is obtained from the "quality indicator" included as part of
  the NMEA GPS_GGA data sentence.  This value applies to the present primary GPS
  fix only and it is not necessarily an indication of the type of GPS receiver in use.  See
  notes associated with the GPS data item.


__________________________________________________

Gyro heading (Gyro)
Format: Heading(degrees true)
Ship's heading (degrees true) obtained from the HEHDT primary sensor.

__________________________________________________

IMET Air Temperature (Air_Temp)
Format: Temp (C)

Data is obtained from IMET_HRH primary sensor.
__________________________________________________

IMET Barometric Pressure (IMET_BPR)
Format:  Barometric pressure (milli-bars)

Sensor installation dates:
  March 5, 2003  (Jacksonville, Fla.)
__________________________________________________

IMET Humidity (IMET_HRH)
Format:  Humidity (%RH), Temperature (C)

Note - IMET air temperature (Air_Temp) is obtained from this instrument.

Sensor installation dates:
  March 5, 2003 (Jacksonville, Fla.)
__________________________________________________

IMET Precipation (IMET_PRC)
IMET_PRC  Precipitation (millimeters)
__________________________________________________

IMET Shortwave Radiation (IMET_SWR)
Format:  Radiation (watts/square meter)
__________________________________________________

IMET Wind (IMET_WND)
Format: X, Y, Total, Max, Min, LastVane, LastCompass, C1, C2

	Wind X (m/sec), Positive for a stbd to port wind
	Wind Y (m/sec), Positive for a bow to stern wind
	Wind Total (m/sec), Averaged over previous minute
	Wind Max (m/sec, 15 sec interval),
	Wind Min (m/sec, 15 sec interval),
	Last Vane Reading (deg),
	Last Compass Reading (deg),
	Counter1 ("0"), Counter2 ("4")
	
	Note - Wind direction is no longer provided as a
	  single quantity.  Direction values are ship relative.
	  The wind sensor does not have a compass installed.
	  (LastCompass should always be 0.0).

Sensor installation dates:
  March 5, 2003
__________________________________________________

IMET relative humidity (HRH)
Format:	  Humidity (%RH)

Data is obtained from IMET_HRH primary sensor.
__________________________________________________

Knudsen bathymetry  ( Knudsen)

Depth to surface (meters).
Format:
   $PKEL99,xx.xx,cc.cc,yy.yy,cc.cc,ssss,lat,lon
	xx.xx  12 kHz depth to surface using cc.cc & ssss corrections (meters)
	cc.cc  depth of 12 kHz transducer (meters)
	yy.yy  3.5 kHz depth to surface using cc.cc & ssss corrections (meters)
	cc.cc  depth of 3.5 kHz transducer (meters)
	ssss    sound speed used for depth calculations (m/s) 
	Lat     Latitude
	Lon    Longitude

Note - 12 kHz and 3.5 kHz transducers are at same depth on Atlantis.
__________________________________________________

Latitude (GPS_Lat)
GPS_LAT   GPS Latitude
__________________________________________________

Longitude (GPS_Lon)
GPS_LON   GPS Longitude
__________________________________________________

NMEA Gyro (HEHDT)
  Ship's heading obtained from the Sperry Gyro.
  NMEA format:  Header ($HEHDT), Heading (degrees), T (true), Heading (degrees), M (magnetic) * checksum.

  Version 2.20 (1/1/97) of the NMEA 0183 standard does not show magnetic heading in this data sentence and the
   validity of this item is questionable.

__________________________________________________

Position from GPS receiver (Lat_Lon)
  Format: decimal Latitude, N/S, decimal Longitude, E/W

__________________________________________________

Salinity (Salinity)
 Format:

  Salinity calculated from SSTMP and SSCND data values in accordance with UNESCO 44.

__________________________________________________

Sea Surface Conductivity (SSCND)
Format:     Sea surface conductivity (mmho/cm)

Sensor installation dates:
  March 5, 2003 (Jacksonville, Fla.)
__________________________________________________

Sea Surface Temperature (SSTMP)
Format:     Sea surface temperature (C)

Falmouth Scientific
Sensor installation dates:
  March 5, 2003 (Jacksonville, Fla)
__________________________________________________

Sound velocity (SSV)

Sea surface sound velocity (meters/second) calculated from
SSTMP and SSCND data values.  Intermediate salinity calculations
are made in accordance with UNESCO 44.

__________________________________________________

True wind direction (Wnd_Dir)

Wind:
	  * * * 01/31/96 Revision: * * *
	  Wind Y (m/sec), Wind X (m/sec), Wind Total (m/sec),
	  Wind Max (m/sec, 15 sec interval),
	  Wind Min (m/sec, 15 sec interval),
	  Last Vane Reading (deg),
	  Last Compass Reading (deg),
	  Counter1 ("0"), Counter2 ("4")
	  Note - Wind direction is no longer provided as a
	  single quantity.  Direction values are ship relative.
	  The wind sensor does not have a compass installed.
	  (value should always be 0.0).

	  WHOI ship installation convention:
	  "Wind Y" is positive for a stbd to port wind.
	  "Wind X" is positive for a bow to stern wind.



__________________________________________________

True wind speed (Wnd_Spd)

Wind:
	  * * * 01/31/96 Revision: * * *
	  Wind Y (m/sec), Wind X (m/sec), Wind Total (m/sec),
	  Wind Max (m/sec, 15 sec interval),
	  Wind Min (m/sec, 15 sec interval),
	  Last Vane Reading (deg),
	  Last Compass Reading (deg),
	  Counter1 ("0"), Counter2 ("4")
	  Note - Wind direction is no longer provided as a
	  single quantity.  Direction values are ship relative.
	  The wind sensor does not have a compass installed.
	  (value should always be 0.0).

	  WHOI ship installation convention:
	  "Wind Y" is positive for a stbd to port wind.
	  "Wind X" is positive for a bow to stern wind.


__________________________________________________

True wind speed & direction (TWind)

__________________________________________________
__________________________________________________
 
Defined constants:
 
CruiseID = AT11-30
WindSensorOffset = 0.0


