PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-18:57:40
G01     91.1           31.7               15.3 +/-    0.40      25.9 +/-    0.40  0.150 / 0.370
G07     124.8          46.6               15.7 +/-    1.34      20.6 +/-    1.34  0.100 / 0.390
G08     42.5           10.2               10.6 +/-    2.87      29.4 +/-    2.87  0.020 / 0.030
G11     70.5           40.6               13.8 +/-    0.72      19.9 +/-    0.72  0.030 / 0.040
G13     295.6          35.7               15.7 +/-    1.11      24.6 +/-    1.11  0.040 / 0.060
G17     214.6          49.6               18.6 +/-    1.62      23.6 +/-    1.62  0.050 / 0.060
G18     64.9           24.2               12.3 +/-    0.90      24.5 +/-    0.90  0.040 / 0.070
G19     214.5          25.0               19.5 +/-    2.22      38.1 +/-    2.22  0.040 / 0.060
G28     348.1          61.8               12.4 +/-    0.68      13.8 +/-    0.68  0.040 / 0.080
G30     103.0          75.8               16.4 +/-    1.22      16.8 +/-    1.22  0.040 / 0.100