PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-15:12:30
G01     79.0           33.0                6.9 +/-    1.22      11.3 +/-    1.22  0.370 / 0.310
G07     132.8          34.0                9.1 +/-    1.19      14.8 +/-    1.19  0.230 / 0.420
G11     57.9           32.4                7.1 +/-    1.32      11.8 +/-    1.32  0.030 / 0.020
G13     285.8          36.8                9.3 +/-    1.39      14.4 +/-    1.39  0.030 / 0.020
G15     311.4          11.7                7.7 +/-    1.82      20.7 +/-    1.82  0.050 / 0.070
G17     223.3          65.3               10.9 +/-    1.13      11.9 +/-    1.13  0.050 / 0.090
G19     219.4          37.4               11.5 +/-    2.29      17.5 +/-    2.29  0.080 / 0.090
G28     6.7            60.5                8.9 +/-    1.20      10.0 +/-    1.20  0.080 / 0.110
G30     123.3          71.0                8.2 +/-    0.63       8.7 +/-    0.63  0.060 / 0.080