PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-18:57:40
G01     109.4          24.4               18.6 +/-    1.88      36.9 +/-    1.88  0.090 / 0.100
G07     102.7          60.4               16.4 +/-    0.78      18.5 +/-    0.78  0.090 / 0.180
G08     42.6           24.9               13.2 +/-    1.94      25.9 +/-    1.94  0.020 / 0.030
G09     175.5          16.0               16.8 +/-    1.59      40.7 +/-    1.59  0.020 / 0.030
G11     93.8           42.9               17.1 +/-    0.63      23.7 +/-    0.63  0.040 / 0.050
G13     311.5          26.9               13.5 +/-    1.35      25.2 +/-    1.35  0.030 / 0.040
G17     206.0          32.0               17.5 +/-    0.80      29.4 +/-    0.80  0.040 / 0.060
G18     83.4           24.0               15.1 +/-    1.57      30.1 +/-    1.57  0.050 / 0.060
G28     313.8          60.6               13.8 +/-    0.90      15.6 +/-    0.90  0.080 / 0.140
G30     19.3           77.1               16.4 +/-    0.75      16.7 +/-    0.75  0.090 / 0.140