PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-14:58:00
G01     112.3          22.5                9.5 +/-    2.66      19.6 +/-    2.66  0.030 / 0.040
G07     97.3           62.3                7.8 +/-    2.20       8.7 +/-    2.20  0.030 / 0.040
G08     42.7           25.0                5.6 +/-   12.44      10.9 +/-   12.44  0.110 / 0.220
G09     175.1          17.6                9.5 +/-    2.99      22.1 +/-    2.99  0.110 / 0.220
G11     96.3           42.2                8.2 +/-    6.91      11.5 +/-    6.91  0.050 / 0.070
G13     313.4          25.1                8.7 +/-    2.57      16.9 +/-    2.57  0.040 / 0.050
G17     204.0          31.6                8.8 +/-    2.68      14.9 +/-    2.68  0.020 / 0.040
G18     86.1           23.2                6.2 +/-    3.29      12.6 +/-    3.29  0.030 / 0.040
G28     307.0          59.8                8.0 +/-    2.61       9.1 +/-    2.61  0.050 / 0.080
G30     1.9            74.4                8.5 +/-    2.52       8.8 +/-    2.52  0.050 / 0.080