PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-19:12:50
G01     113.5          21.9               13.4 +/-    1.13      28.3 +/-    1.13  0.060 / 0.080
G07     94.4           63.4               10.6 +/-    0.63      11.7 +/-    0.63  0.050 / 0.080
G08     43.6           28.9                7.7 +/-    0.71      13.8 +/-    0.71  0.120 / 0.170
G09     176.4          20.1               13.2 +/-    1.32      29.0 +/-    1.32  0.150 / 0.190
G11     100.1          42.1               13.0 +/-    0.59      18.4 +/-    0.59  0.030 / 0.040
G13     314.4          23.9                9.8 +/-    1.55      19.6 +/-    1.55  0.040 / 0.040
G17     204.6          27.4               12.0 +/-    1.84      22.2 +/-    1.84  0.060 / 0.060
G18     88.1           23.0               10.1 +/-    0.99      20.8 +/-    0.99  0.070 / 0.060
G28     305.3          59.6               11.8 +/-    0.91      13.5 +/-    0.91  0.040 / 0.080
G30     5.0            74.4               11.8 +/-    0.77      12.2 +/-    0.77  0.050 / 0.080