PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-18:57:40
G01     111.2          23.3               13.0 +/-    1.34      26.4 +/-    1.34  0.060 / 0.130
G07     99.3           61.7               12.1 +/-    0.54      13.6 +/-    0.54  0.050 / 0.110
G08     43.0           26.5                9.3 +/-    0.87      17.6 +/-    0.87  0.030 / 0.040
G09     175.9          17.7               15.4 +/-    1.61      35.9 +/-    1.61  0.030 / 0.040
G11     96.4           42.6               12.1 +/-    1.09      16.9 +/-    1.09  0.100 / 0.230
G13     312.8          25.7               12.7 +/-    2.41      24.4 +/-    2.41  0.090 / 0.180
G17     205.3          30.1               16.8 +/-    1.88      29.3 +/-    1.88  0.050 / 0.070
G18     85.4           23.6                9.8 +/-    1.08      19.7 +/-    1.08  0.040 / 0.060
G28     310.1          60.2               11.9 +/-    0.58      13.5 +/-    0.58  0.040 / 0.080
G30     12.3           76.0               13.2 +/-    0.52      13.5 +/-    0.52  0.040 / 0.070