PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-17:58:10
G07     63.8           66.4               11.5 +/-    0.66      12.5 +/-    0.66  0.030 / 0.040
G08     51.6           40.4               10.7 +/-    0.43      15.5 +/-    0.43  0.030 / 0.040
G09     179.2          39.4               14.9 +/-    0.76      21.9 +/-    0.76  0.060 / 0.090
G11     118.8          35.0               14.0 +/-    0.83      22.3 +/-    0.83  0.050 / 0.080
G13     321.2          11.0               -6.1 +/-   19.78     -16.8 +/-   19.78  0.030 / 0.040
G17     199.1          13.4               16.5 +/-    1.62      42.5 +/-    1.62  0.030 / 0.040
G18     103.2          15.8               12.8 +/-    0.85      31.2 +/-    0.85  0.290 / 0.430
G27     37.7           10.0                9.9 +/-    3.88      27.6 +/-    3.88  0.180 / 0.530
G28     268.8          48.3               14.3 +/-    0.96      18.4 +/-    0.96  0.100 / 0.250
G30     333.2          60.7               11.5 +/-    0.62      13.0 +/-    0.62  0.080 / 0.250