PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/12-13:42:50
G01     103.7          26.3                8.3 +/-    0.80      15.7 +/-    0.80  0.060 / 0.050
G07     112.2          52.5                9.2 +/-    0.76      11.3 +/-    0.76  0.070 / 0.060
G08     41.9           20.8                7.9 +/-    2.82      17.0 +/-    2.82  0.040 / 0.090
G09     174.9          12.7                6.2 +/-    1.44      16.3 +/-    1.44  0.040 / 0.070
G11     85.3           43.6                9.6 +/-    0.65      13.2 +/-    0.65  0.020 / 0.040
G13     307.2          31.1                7.2 +/-    1.06      12.2 +/-    1.06  0.040 / 0.050
G17     206.6          37.3                8.4 +/-    0.95      12.8 +/-    0.95  0.090 / 0.080
G18     76.7           24.3                7.9 +/-    1.04      15.7 +/-    1.04  0.060 / 0.080
G28     310.5          59.1                7.1 +/-    1.39       8.1 +/-    1.39  0.280 / 0.290
G30     43.3           79.2                8.8 +/-    1.12       8.9 +/-    1.12  0.220 / 0.300