FIELD NAME 
DESCRIPTION 
MEASUREMENT UNIT 
RELATED TO INSTRUMENTS 
ELABORATION LEVEL 
2ndlocktime 
Lock time on the second frequency used for the TEC computation

seconds 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004

LEVELI 
averagel1 
Average Sig1 C/N0 over the last minute 
dBHz 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
avg_c_n0_l2c 
Average Sig2 C/N0 over the last minute 
dBHz 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
avg_c_n0_l5 
Average Sig3 C/N0 over the last minute 
dBHz 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
avgccd_l2c 
AvgCCD on Sig2, average of code/carrier divergence

meters 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
avgccd_l5 
AvgCCD on Sig3, average of code/carrier divergence

meters 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
avgccdl1 
AvgCCD on Sig1, average of code/carrier divergence

meters 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
avgcn2freqtec 
Averaged C/N0 of second frequency used for the TEC computation

dBHz 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004

LEVELI 
azimuth 
Azimuth of the SV 
degrees 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
chanstatus 
Channel status 
 
NovAtel GSV4004 
LEVELI 
correctionS4_L2C 
Correction to total S4 on Sig2 (thermal noise component only)

 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
corrections4_l5 
Correction to total S4 on Sig3 (thermal noise component only)

 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
corrections4l1 
Correction to total S4 on Sig1 (thermal noise component only)

 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
dt 
measurement time UTC 
timestamp 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

 
dtec0 
dTEC from TOW  15s to TOW 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
dtec0_2c 
dTEC from TOW  15s to TOW 
TECu 
NovAtel GPStation6 
LEVELI 
dtec30_15 
dTEC from TOW  30s to TOW  15s 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
dtec30_15_2c 
dTEC from TOW  30s to TOW  15s 
TECu 
NovAtel GPStation6 
LEVELI 
dtec45_30 
dTEC from TOW  45s to TOW  30s 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
dtec45_30_2c 
dTEC from TOW  45s to TOW  30s 
TECu 
NovAtel GPStation6 
LEVELI 
dtec60_45 
dTEC from TOW  60s to TOW  45s 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
dtec60_45_2c 
dTEC from TOW  60s to TOW  45s 
TECu 
NovAtel GPStation6 
LEVELI 
elevation 
Elevation of the SV 
degrees 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
ipp_lat 
Latitude of the Ionospheric Pierce Point at 350 km

degrees 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from azimuth and elevation)

ipp_lon 
Longitude of the Ionospheric Pierce Point at 350 km

degrees 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from azimuth and elevation

locktime_l2c 
Sig2 lock time 
seconds 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
locktime_l5 
Sig3 lock time 
seconds 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
locktimel1 
Sig1 lock time 
seconds 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
p_l2c 
p on Sig2, phase spectral slope in the 0.1 to 25Hz range

 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
p_l5 
p on Sig3, phase spectral slope in the 0.1 to 25Hz range

 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
phi01_l2c 
Phi01 on Sig2, 1second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi01_l5 
Phi01 on Sig3, 1second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi01l1 
Phi01 on Sig1, 1second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
phi03_l2c 
Phi03 on Sig2, 3second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi03_l5 
Phi03 on Sig3, 3second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi03l1 
Phi03 on Sig1, 3second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
phi10_l2c 
Phi10 on Sig2, 10second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi10_l5 
Phi10 on Sig3, 10second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi10l1 
Phi10 on Sig1, 10second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
phi30_l2c 
Phi30 on Sig2, 30second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi30_l5 
Phi30 on Sig3, 30second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi30l1 
Phi30 on Sig1, 30second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
phi60_l1_vert 
Verticalized sigmaphi index on the first frequency

rads 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from phi60l1slant, elevation)

phi60_l2_vert 
Verticalized sigmaphi index on the second frequency

rads 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI (evaluated from phi60_l2c, elevation)

phi60_l2c 
Phi60 on Sig2, 60second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi60_l5 
Phi60 on Sig3, 60second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
phi60_l5_vert 
Verticalized sigmaphi index on the third frequency

rads 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI (evaluated from phi60_l5, elevation)

phi60l1slant 
Phi60 on Sig1, 60second phase sigma 
radians 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
pl1 
p on Sig1, spectral slope of detrended phase in the 0.1 to 25Hz range

 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
PRN 
Satellite constellation and number (G: GPS; R: Glonass; S: SBAS
block1; E: GALILEO; C:Beidou; Q: QZSS; I: IRNSS)

 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
rxstate 
Value of the RxState field of the ReceiverStatus SBF block

 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004

LEVELI 
s4_l1_slant 
Slant s4 index on the first frequency 
 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from totalS4L1, correctionS4L1)

s4_l1_vert 
Verticalized s4 index on the first frequency

 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from totalS4L1, correctionS4L1, pl1, elevation)

s4_l2_slant 
Slant s4 index on the second frequency 
 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI (evaluated from totalS4_L2C, correctionS4_L2C)

s4_l2_vert 
Vertical s4 index on the second frequency 
 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI (evaluated from totalS4_L2C, correctionS4_L2C, p_l2c,
elevation)

s4_l5_slant 
Slant s4 index on the third frequency 
 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI (evaluated from totalS4_L5, correctionS4_L5)

si_l1_29 
SI Index on
Sig1:(10*log10(Pmax)10*log10(Pmin))/(10*log10(Pmax)+10*log10(Pmin))

 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
si_l1_30 
SI Index on Sig1, numerator only: 10*log10(Pmax)10*log10(Pmin)

dB 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
si_l2c_43 
SI Index on Sig2 
 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
si_l2c_44 
SI Index on Sig2, numerator only: 10*log10(Pmax)10*log10(Pmin)

dB 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
si_l5_57 
SI Index on Sig3 
 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
si_l5_58 
SI Index on Sig3, numerator only: 10*log10(Pmax)10*log10(Pmin)

dB 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
sigmaccd_l2c 
SigmaCCD on Sig2, standard deviation of code/carrier divergence

meters 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
sigmaccd_l5 
SigmaCCD on Sig3, standard deviation of code/carrier divergence

meters 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
sigmaccdl1 
SigmaCCD on Sig1, standard deviation of code/carrier divergence

meters 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
stec 
Slant Total Electron Content 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from tec0, tec15, tec30, tec45, elevation)

svid 
SV number 
 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
t_l1 
T on Sig1, phase power spectral density at 1 Hz

rad^2/Hz 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
t_l2c 
T on Sig2, phase power spectral density at 1 Hz

rad^2/Hz 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
t_l5 
T on Sig3, phase power spectral density at 1 Hz

rad^2/Hz 
Septentrio PolaRx5S/PolaRxS 
LEVELI 
tec0 
TEC at TOW 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
tec0_2c 
TEC at TOW 
TECu 
NovAtel GPStation6 
LEVELI 
tec15 
TEC at TOW  15 seconds 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
tec15_2c 
TEC at TOW  15 seconds 
TECu 
NovAtel GPStation6 
LEVELI 
tec30 
TEC at TOW  30 seconds 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
tec30_2c 
TEC at TOW  30 seconds 
TECu 
NovAtel GPStation6 
LEVELI 
tec45 
TEC at TOW  45 seconds 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
tec45_2c 
TEC at TOW  45 seconds 
TECu 
NovAtel GPStation6 
LEVELI 
totals4_l2c 
Total S4 on Sig2 
 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
totals4_l5 
Total S4 on Sig3 
 
Septentrio PolaRx5S/PolaRxS NovAtel GPStation6

LEVELI 
totals4l1 
Total S4 on Sig1 
 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI 
vtec 
Vertical Total Electron Content 
TECu 
Septentrio PolaRx5S/PolaRxS NovAtel GSV4004 NovAtel GPStation6

LEVELI (evaluated from tec0, tec15, tec30, tec45, elevation)
