PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-17:43:10
G01     116.4          19.9               14.4 +/-    0.86      31.7 +/-    0.86  0.040 / 0.030
G07     87.5           65.3               12.8 +/-    0.62      14.0 +/-    0.62  0.030 / 0.030
G08     44.4           30.8                9.7 +/-    0.90      16.7 +/-    0.90  0.050 / 0.080
G09     176.6          22.9               15.1 +/-    1.79      31.0 +/-    1.79  0.050 / 0.100
G11     103.8          41.1               14.5 +/-    0.59      20.7 +/-    0.59  0.030 / 0.040
G13     316.2          21.7                9.3 +/-    1.52      19.5 +/-    1.52  0.020 / 0.040
G17     203.4          25.1               15.3 +/-    2.64      29.8 +/-    2.64  0.040 / 0.080
G18     91.4           22.0               11.2 +/-    1.30      23.5 +/-    1.30  0.050 / 0.080
G28     298.9          58.6               12.1 +/-    0.76      13.9 +/-    0.76  0.090 / 0.220
G30     354.6          71.6               11.9 +/-    1.01      12.5 +/-    1.01  0.120 / 0.180