PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-19:12:30
G07     351.4          63.7               14.7 +/-    0.33      16.2 +/-    0.33  0.040 / 0.040
G08     85.2           54.5               14.7 +/-    1.15      17.6 +/-    1.15  0.050 / 0.050
G09     183.6          61.7               16.5 +/-    0.68      18.5 +/-    0.68  0.090 / 0.150
G11     139.8          20.1               16.9 +/-    1.48      37.1 +/-    1.48  0.070 / 0.150
G23     157.2          26.0               15.0 +/-    1.29      28.6 +/-    1.29  0.060 / 0.060
G27     45.5           24.2               11.5 +/-    1.59      22.9 +/-    1.59  0.070 / 0.060
G28     247.9          38.8               15.5 +/-    0.59      23.0 +/-    0.59  0.040 / 0.050
G30     313.0          44.8               13.3 +/-    0.76      17.9 +/-    0.76  0.030 / 0.040