PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-22:43:10
G02     199.7          20.1               20.4 +/-    1.54      44.8 +/-    1.54  0.040 / 0.050
G06     171.2          52.3               17.9 +/-    0.74      21.9 +/-    0.74  0.040 / 0.050
G13     228.8          14.2               16.9 +/-    1.73      43.0 +/-    1.73  0.280 / 0.520
G17     12.4           64.3               12.9 +/-    0.80      14.2 +/-    0.80  0.130 / 0.280
G19     313.8          71.0               13.6 +/-    0.61      14.2 +/-    0.61  0.170 / 0.370
G24     311.2          28.3               11.4 +/-    1.58      20.6 +/-    1.58  0.200 / 0.380
G28     86.4           40.4               13.6 +/-    1.34      19.6 +/-    1.34  0.060 / 0.100
G30     156.5          14.9               19.1 +/-    2.04      47.7 +/-    2.04  0.080 / 0.130