PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-21:43:10
G02     205.6          42.5               14.4 +/-    1.67      20.2 +/-    1.67  0.070 / 0.180
G06     138.6          76.3               14.1 +/-    0.59      14.4 +/-    0.59  0.080 / 0.200
G12     311.6          21.7                9.5 +/-    3.61      20.1 +/-    3.61  0.060 / 0.100
G17     40.2           46.4               10.0 +/-    0.46      13.3 +/-    0.46  0.050 / 0.090
G19     12.0           61.7               11.1 +/-    0.55      12.5 +/-    0.55  0.040 / 0.070
G24     289.0          41.1               10.1 +/-    1.27      14.4 +/-    1.27  0.050 / 0.070
G28     109.3          26.1               13.8 +/-    0.87      26.3 +/-    0.87  0.040 / 0.050