PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-13:43:00
G01     128.3          10.6                2.2 +/-   32.67       6.1 +/-   32.67  0.030 / 0.040
G07     47.3           69.7                9.6 +/-    0.38      10.1 +/-    0.38  0.040 / 0.030
G08     51.6           40.6                7.5 +/-    1.47      10.8 +/-    1.47  0.030 / 0.030
G09     177.2          36.5                9.2 +/-    1.23      14.3 +/-    1.23  0.040 / 0.020
G11     119.6          34.4               11.2 +/-    0.68      17.9 +/-    0.68  0.150 / 0.320
G13     321.5          10.4               -6.0 +/-   11.80     -16.6 +/-   11.80  0.130 / 0.200
G17     199.8          13.0                6.8 +/-    1.09      17.8 +/-    1.09  0.160 / 0.460
G18     105.1          15.8                8.5 +/-    2.41      20.6 +/-    2.41  0.200 / 0.340
G28     273.6          52.0                9.0 +/-    2.66      11.0 +/-    2.66  0.260 / 0.300
G30     330.2          58.6                7.8 +/-    0.94       9.0 +/-    0.94  0.070 / 0.070