PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-19:28:10
G01     101.3          27.7               15.6 +/-    0.71      28.6 +/-    0.71  0.050 / 0.070
G07     116.6          48.0               16.3 +/-    0.33      21.1 +/-    0.33  0.040 / 0.060
G08     41.5           15.4                9.7 +/-    1.44      24.0 +/-    1.44  0.030 / 0.060
G09     174.5          10.4               17.2 +/-    2.52      47.6 +/-    2.52  0.030 / 0.060
G11     80.0           42.6               15.2 +/-    1.05      21.3 +/-    1.05  0.030 / 0.030
G13     304.8          32.4               12.2 +/-    2.41      20.3 +/-    2.41  0.030 / 0.030
G17     207.2          43.7               17.9 +/-    1.24      24.6 +/-    1.24  0.100 / 0.200
G18     72.4           24.0               12.4 +/-    0.98      24.8 +/-    0.98  0.080 / 0.150
G28     318.9          60.4               13.6 +/-    0.86      15.4 +/-    0.86  0.090 / 0.200
G30     60.4           79.3               13.2 +/-    0.60      13.4 +/-    0.60  0.090 / 0.160