PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-18:42:50
G01     108.8          24.7               14.9 +/-    1.67      29.2 +/-    1.67  0.120 / 0.090
G07     103.8          60.0               13.6 +/-    0.76      15.5 +/-    0.76  0.070 / 0.160
G08     42.5           24.1               10.9 +/-    1.99      21.7 +/-    1.99  0.030 / 0.030
G09     175.4          15.4               12.6 +/-    1.51      31.0 +/-    1.51  0.020 / 0.030
G11     92.8           42.9               14.8 +/-    0.91      20.6 +/-    0.91  0.030 / 0.030
G13     311.0          27.4                9.7 +/-    1.62      17.9 +/-    1.62  0.040 / 0.040
G17     206.1          32.9               12.5 +/-    1.10      20.7 +/-    1.10  0.050 / 0.050
G18     82.7           24.1               13.5 +/-    1.90      26.9 +/-    1.90  0.040 / 0.070
G28     315.0          60.7               11.6 +/-    0.95      13.1 +/-    0.95  0.100 / 0.170
G30     21.2           77.4               14.0 +/-    0.61      14.3 +/-    0.61  0.090 / 0.160