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Name Template: PUB/MISSION/level1b/scnLv1/YYYY.DDD/scnLv1_IIII.YYYY.DDD.HH.MM.UUUU.GGG.TT_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)
TTAntenna ID
UUUUDuration of file in minutes
VVVVVersion (an ID which tells the version of all codes using in generating thie file)
YYYYYear

S4 scintillation index and auxiliary data. Each file contains continuous S4 data (one value each second based on 50 Hz internal receiver sampling) from one GPS satellite (small data gaps are allowed). For more information please see the: S4_description.pdf file

Global Data


processing_center

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

creation_time

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

mission

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

dump_id

  • Description:Data dump ID
  • Data Type: char

leo_id

  • Description:ID of the LEO satellite
  • Data Type: int

antenna_id

  • Description:ID of the LEO antenna
  • Data Type: int

prn_id

  • Description:PRN ID of the GPS satellite
  • Data Type: int

start_time

  • Description:Starttime of data arc in GPS seconds
  • Data Type: double

stop_time

  • Description:Stoptime of data arc in GPS seconds
  • Data Type: double

year

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

month

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

day

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

hour

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

minute

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

second

  • Description:Second of minute of start_time
  • Data Type: float

duration

  • Description:Duration of data arc in seconds
  • Data Type: float

parmsfile

  • Description:Name of input parameter file used in processing
  • Data Type: char

s4min

  • Description:Minimum (1-sec based) S4 index in arc
  • Data Type: double

s4max

  • Description:Maximum (1-sec based) S4 index in arc
  • Data Type: double

s4max9sec

  • Description:S4 index based on 9 seconds around maximum S4 index
  • Data Type: double
  • Missing Value: -999

powmin

  • Description:Minimum (smoothed) intensity in arc
  • Data Type: double

powmax

  • Description:Maximum (smoothed) intensity in arc
  • Data Type: double

elevmin

  • Description:Minimum elevation angle
  • Data Type: double
  • Units: deg

elevmax

  • Description:Maximum elevation angle
  • Data Type: double
  • Units: deg

pow_s4max

  • Description:Intensity at maximum S4 index
  • Data Type: double

elev_s4max

  • Description:Elevation angle at maximum S4 index
  • Data Type: double
  • Units: deg

alt_s4max

  • Description:Altitude of LEO satellite position at maximum S4 index
  • Data Type: double
  • Units: km

lat_s4max

  • Description:Latitude of LEO satellite position at maximum S4 index
  • Data Type: double
  • Units: deg

lon_s4max

  • Description:Longitude of LEO satellite position at maximum S4 index
  • Data Type: double
  • Units: deg

lct_s4max

  • Description:Local time of LEO satellite position at maximum S4 index
  • Data Type: double
  • Units: hrs

alttp_s4max

  • Description:Altitude of tangent point position at maximum S4 index
  • Data Type: double
  • Units: km
  • Missing Value: -999

lattp_s4max

  • Description:Latitude of tangent point position at maximum S4 index
  • Data Type: double
  • Units: deg
  • Missing Value: -999

lontp_s4max

  • Description:Longitude of tangent point position at maximum S4 index
  • Data Type: double
  • Units: deg
  • Missing Value: -999

lcttp_s4max

  • Description:Local time of tangent point position at maximum S4 index
  • Data Type: double
  • Units: hrs
  • Missing Value: -999

alt_start

  • Description:Altitude of LEO satellite position at start_time
  • Data Type: double
  • Units: km

lat_start

  • Description:Latitude of LEO satellite position at start_time
  • Data Type: double
  • Units: deg

lon_start

  • Description:Longitude of LEO satellite position at start_time
  • Data Type: double
  • Units: deg

lct_start

  • Description:Local time of LEO satellite position at start_time
  • Data Type: double
  • Units: hrs

alt_stop

  • Description:Altitude of LEO satellite position at stop_time
  • Data Type: double
  • Units: km

lat_stop

  • Description:Latitude of LEO satellite position at stop_time
  • Data Type: double
  • Units: deg

lon_stop

  • Description:Longitude of LEO satellite position at stop_time
  • Data Type: double
  • Units: deg

lct_stop

  • Description:Local time of LEO satellite position at stop_time
  • Data Type: double
  • Units: hrs

Profile Data


time

  • Description:Time of GPS measurement (GPS seconds)
  • Data Type: double
  • Units: s
  • Valid Range: 0, 99999

S4

  • Description:S4 scintillation index
  • Data Type: float
  • Units: unit_less
  • Valid Range: 0, 5

elevation

  • Description:Elevation angle of LEO-GPS link
  • Data Type: double
  • Units: deg
  • Valid Range: -90, 90

caL1_SNR

  • Description:Signal to Noise Ratio on the L1 channel, CA code
  • Data Type: float
  • Units: volts/volt
  • Valid Range: 0, 9999

sqrt_I

  • Description:Square root of mean intensity on the L1 channel, CA code
  • Data Type: float
  • Units: arbitrary
  • Valid Range: 0, 9999

x_LEO

  • Description:LEO x position (ECF) at time of signal reception
  • Data Type: double
  • Units: km
  • Valid Range: -9999, 9999

y_LEO

  • Description:LEO y position (ECF) at time of signal reception
  • Data Type: double
  • Units: km
  • Valid Range: -9999, 9999

z_LEO

  • Description:LEO z position (ECF) at time of signal reception
  • Data Type: double
  • Units: km
  • Valid Range: -9999, 9999

x_GPS

  • Description:GPS x position (ECF) at time of signal transmission
  • Data Type: double
  • Units: km
  • Valid Range: -29999, 29999

y_GPS

  • Description:GPS y position (ECF) at time of signal transmission
  • Data Type: double
  • Units: km
  • Valid Range: -29999, 29999

z_GPS

  • Description:GPS z position (ECF) at time of signal transmission
  • Data Type: double
  • Units: km
  • Valid Range: -29999, 29999