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Name Template: PUB/MISSION/level2/atmPrf/YYYY.DDD/atmPrf_IIII.YYYY.DDD.HH.MM.GGG_SSSS.VVVV_nc
DDDDay of year
GGGGNSS id (G28 = GPS satellite 28)
HHHour
IIIIMission ID (CHAM, SACC, CO01-06, GPSM, etc)
LLLLEO number (1-6 for COSMIC)
MISSIONMission ID (eight characters or less--champ, champrt, sacc, sacctst, etc)
MMMinute
PUBBase directory for the pub hierarchy
SSSSSubtype (an ID which tells the command options used in generating this file)
VVVVVersion (an ID which tells the version of all codes using in generating thie file)
YYYYYear

An atmospheric profile without moisture information.

This file is in netCDF format (see http://www.unidata.ucar.edu/packages/netcdf/index.html) and contains full resolution profiles of physical parameters such as dry pressure, dry temperature, refractivity, bending angle, impact parameter, etc.versus geometric height above mean sea level.

It is similar to the megafile which stored full resolution inversion results for GPS/MET, but no excess phase and satellite position data are included. It was decided to leave these data in the atmPhs file as it is difficult to accurately and unambiguously assign a correspondence between time (the independent variable in the atmPhs files) and height (the independent variable in atmPrf files).

Global Data

start_time

  • Description:Starting time for the occultation
  • Data Type: double(8)
  • Units: GPS seconds

stop_time

  • Description:Ending time for the occultation
  • Data Type: double(8)
  • Units: GPS seconds

fileStamp

  • Description:The complete ID for this occultation (IIII.YYYY.DDD.HH.MM.GGG).
  • Data Type: char

curv

  • Description:The X, Y and Z offset of the center of sphericity used in the inversion from the center of mass of the Earth
  • Data Type: 3*double(8)
  • Units: km
  • Valid Range: -200, 200

occpt_offset

  • Description:The time offset from the start of the occultation and the occultation point, at which curv is measured
  • Data Type: double(8)
  • Units: sec
  • Valid Range: 0, 240

rgeoid

  • Description:The height of the geoid ABOVE the reference ellipsoid at the lat/lon position at the occultation point
  • Data Type: double(8)
  • Units: km
  • Valid Range: -150, 150

rfict

  • Description:Local curvature radius of the reference ellipsoid for the occultation point
  • Data Type: double(8)
  • Units: km
  • Valid Range: 6200, 6600

lat

  • Description:Latitude of perigee point at occultation point
  • Data Type: double(8)
  • Units: deg
  • Valid Range: -90, 90

lon

  • Description:Longitude of perigee point at occultation point
  • Data Type: double(8)
  • Units: deg
  • Valid Range: -180, 180

azim

  • Description:Azimuth angle of the occultation plane at tangent point with respect North direction, positive to the East from the North direction. The angle is measured between North and the GPS direction of the raypath.
  • Data Type: double(8)
  • Units: deg
  • Valid Range: -180, 180

bad

  • Description:Badness flag. 1 = Profile flunked quality control, 0 = Profile passed QC
  • Data Type: int

errstr

  • Description:Error string. If bad = 1, contains the desription of the problem found, else contains the null string
  • Data Type: string

Profile Data

Pres

  • Description:Dry pressure
  • Data Type: float
  • Units: mb
  • Valid Range: 0, 1500
  • Missing Value: -999

Ref

  • Description:Refractivity
  • Data Type: float
  • Units: N
  • Valid Range: 0, 9999
  • Missing Value: -999

Lon

  • Description:Longitude of perigee point
  • Data Type: float
  • Units: deg
  • Valid Range: -180, 180
  • Missing Value: -999

Opt_bend_ang

  • Description:Optimized bending angle
  • Data Type: double
  • Units: rad
  • Valid Range: 0, 10
  • Missing Value: -999

Temp

  • Description:Dry temperature
  • Data Type: float
  • Units: C
  • Valid Range: -200, 100
  • Missing Value: -999

MSL_alt

  • Description:Mean sea level altitude of perigee point
  • Data Type: float
  • Units: km
  • Valid Range: 0, 9999
  • Missing Value: -999

Impact_parm

  • Description:Impact parameter
  • Data Type: double
  • Units: km
  • Valid Range: 0, 9999
  • Missing Value: -999

Lat

  • Description:Latitude of perigee point
  • Data Type: float
  • Units: deg
  • Valid Range: -90, 90
  • Missing Value: -999

Azim

  • Description:Azimuth angle of the occultation plane at tangent point with respect North direction, positive to the East from the North direction. The angle is measured between North and the GPS direction of the raypath.
  • Data Type: float
  • Units: de
  • Valid Range: -180, 180
  • Missing Value: -999

Bend_ang

  • Description:Raw (unoptimized) bending angle
  • Data Type: double
  • Units: rad
  • Valid Range: 0, 10
  • Missing Value: -999