PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-18:27:50
G01     94.0           30.9               13.4 +/-    0.87      23.1 +/-    0.87  0.170 / 0.220
G07     122.3          48.8               14.7 +/-    0.51      18.8 +/-    0.51  0.190 / 0.240
G08     42.2           12.0                8.0 +/-    1.45      21.4 +/-    1.45  0.030 / 0.030
G11     73.5           41.4               13.5 +/-    0.64      19.3 +/-    0.64  0.030 / 0.030
G13     298.3          34.8               13.9 +/-    1.77      22.1 +/-    1.77  0.040 / 0.060
G17     212.8          47.4               16.6 +/-    1.02      21.7 +/-    1.02  0.040 / 0.060
G18     67.5           24.5               11.5 +/-    0.84      22.7 +/-    0.84  0.040 / 0.070
G19     213.4          22.6               17.7 +/-    2.39      36.7 +/-    2.39  0.040 / 0.090
G28     343.0          61.9               12.0 +/-    0.73      13.4 +/-    0.73  0.040 / 0.050
G30     92.7           77.5               14.6 +/-    0.57      14.9 +/-    0.57  0.040 / 0.050