PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-18:42:50
G07     305.9          45.7               13.2 +/-    1.30      17.6 +/-    1.30  0.080 / 0.080
G08     134.0          39.2               16.1 +/-    0.79      23.7 +/-    0.79  0.060 / 0.100
G09     305.5          77.3               12.6 +/-    0.64      12.9 +/-    0.64  0.040 / 0.050
G16     42.0           24.0               10.1 +/-    1.16      20.2 +/-    1.16  0.040 / 0.050
G23     142.9          60.4               15.4 +/-    0.80      17.5 +/-    0.80  0.080 / 0.540
G27     79.0           37.0               11.7 +/-    0.68      18.0 +/-    0.68  0.100 / 0.580
G28     224.0          12.7               15.3 +/-    2.81      40.2 +/-    2.81  0.030 / 0.070
G30     286.5          23.8               14.0 +/-    1.00      28.2 +/-    1.00  0.030 / 0.070