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Name Template: PUB/MISSION/level2/igaPrf/YYYY.DDD/igaPrf_IIII.YYYY.DDD.HH.MM.GGG_SSSS.VVVV_nc

DDDDay of year
GGGGNSS id (G28 = GPS satellite 28)
HHHour
IIIIMission ID (CHAM, SACC, C001-06, 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 this file)
YYYYYear
An ionospheric data profile for a single occultation in netCDF format. Profiles are obtained through application of an aided Abel inversion, which uses the monthly mean NmF2 to provide information on horizontal gradients in the ionosphere.

Global Data

NmF2_Grid_File

  • Description:Grid file used in the NmF2 aided Abel inversion
  • Data Type: char

occ_id

  • Description:Occultation ID
  • Data Type: int

fiducial_id

  • Description:Fiducial station used for double differencing
  • Data Type: char

reference_sat_id

  • Description:PRN ID of reference satellite
  • Data Type: int

occulting_sat_id

  • Description:PRN ID of occulting satellite
  • Data Type: int

year

  • Description:Year (four digit) of edmaxtime
  • Data Type: int

month

  • Description:Month of the year of edmaxtime
  • Data Type: int

day

  • Description:Day of the month of edmaxtime
  • Data Type: int

hour

  • Description:Hour of day of edmaxtime
  • Data Type: int

minute

  • Description:Minute of hour of edmaxtime
  • Data Type: int

second

  • Description:Second of minute of edmaxtime
  • Data Type: double

offset

  • Description:Offset of short vectors in long vectors
  • Data Type: int

shortlen

  • Description:Size of short vectors
  • Data Type: int

setting

  • Description:Flag: 1 for setting occultations, 0 for rising occultations
  • Data Type: int

icalib

  • Description:Flag: 1 for far-side TEC calibration, 0 for quasi-calibration
  • Data Type: int

botnum

  • Description:Bottom data number
  • Data Type: int

bottime

  • Description:Time at bottom of occultation in GPS seconds
  • Data Type: double
  • Units: s

botlct

  • Description:Local time at bottime and botlon
  • Data Type: double
  • Units: hrs

botalt

  • Description:Bottom altitude
  • Data Type: double
  • Units: km

botlat

  • Description:Bottom latitude
  • Data Type: double
  • Units: deg

botlon

  • Description:Bottom longitude
  • Data Type: double
  • Units: deg

botaz

  • Description:Bottom azimuth angle of occultation plane with respect to North
  • Data Type: double
  • Units: deg

topnum

  • Description:Top data number
  • Data Type: int

toptime

  • Description:Time at top of occultation in GPS seconds
  • Data Type: double
  • Units: s

toplct

  • Description:Local time at toptime and toplon
  • Data Type: double
  • Units: hrs

topalt

  • Description:Top altitude
  • Data Type: double
  • Units: km

toplat

  • Description:Top latitude
  • Data Type: double
  • Units: deg

toplon

  • Description:Top longitude
  • Data Type: double
  • Units: deg

topaz

  • Description:Top azimuth angle of occultation plane with respect to North
  • Data Type: double
  • Units: deg

edmaxtime

  • Description:Time at electron density maximum in GPS seconds
  • Data Type: double
  • Units: s

edmaxlct

  • Description:Local time at edmaxtime and edmaxlon
  • Data Type: double
  • Units: hrs

edmaxalt

  • Description:Altitude at maximum electron density
  • Data Type: double
  • Units: km

edmaxlat

  • Description:Latitude at maximum electron density
  • Data Type: double
  • Units: deg

edmaxlon

  • Description:Longitude at maximum electron density
  • Data Type: double
  • Units: deg

edmaxaz

  • Description:Azimuth angle of occ. plane with respect to North at maximum electron density
  • Data Type: double
  • Units: deg

smear

  • Description:Horizontal smear of tangent points from top to bottom
  • Data Type: double
  • Units: km

edmax

  • Description:Maximum electron density
  • Data Type: double
  • Units: el/cm3

critfreq

  • Description:Critical frequency at maximum electron density
  • Data Type: double
  • Units: MHz

tec0

  • Description:Integrated TEC between bottom and top
  • Data Type: double
  • Units: TECU

tec1

  • Description:Extrapolated TEC above top
  • Data Type: double
  • Units: TECU

edorbtime

  • Description:Time of electron density estimation at orbit altitude in GPS seconds
  • Data Type: double
  • Units: s

edorbalt

  • Description:Altitude of electron density estimation at orbit altitude
  • Data Type: double
  • Units: km

edorb

  • Description:Electron density at orbit altitude
  • Data Type: double
  • Units: el/cm3

hscale

  • Description:Scale height at orbit altitude (estimated and used only for icalib = 0)
  • Data Type: double
  • Units: km

topfit

  • Description:Post-fit residual near the top
  • Data Type: double
  • Units: TECU

nmax

  • Description:Size of the vector data
  • Data Type: int

fileStamp

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

inverter

  • Description:Name of program used for data inversion
  • Data Type: char

parmsfile

  • Description:Name of input parameter file
  • Data Type: char

center

  • Description:Name of processing center
  • Data Type: char

mission

  • Description:Name of the mission
  • Data Type: char

creation_time

  • Description:Time of file creation
  • Data Type: char

Profile Data

MSL_alt

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

GEO_lon

  • Description:Geographical longitude of perigee point
  • Data Type: float
  • Units: degrees_east
  • Valid Range: -180, 180
  • Missing Value: -999

GEO_lat

  • Description:Geographical latitude of perigee point
  • Data Type: float
  • Units: degrees_north
  • Valid Range: -90, 90
  • Missing Value: -999

OCC_azi

  • Description:Azimuth angle of occ. plane with respect to north
  • Data Type: float
  • Units: deg
  • Valid Range: -180, 180
  • Missing Value: -999

TEC_cal

  • Description:Calibrated occultation TEC below LEO orbit
  • Data Type: float
  • Units: TECU
  • Valid Range: -100000000, 100000000
  • Missing Value: -999

ELEC_dens

  • Description:Electron density
  • Data Type: float
  • Units: el/cm3
  • Valid Range: -100000000, 100000000
  • Missing Value: -999






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