PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-23:27:40
G02     267.4          80.5               10.5 +/-    0.60      10.7 +/-    0.60  0.070 / 0.070
G05     168.6          22.2               16.2 +/-    2.96      33.8 +/-    2.96  0.060 / 0.070
G06     40.1           51.7               11.2 +/-    0.61      13.9 +/-    0.61  0.030 / 0.030
G12     321.1          58.7               11.0 +/-    0.60      12.7 +/-    0.60  0.030 / 0.040
G17     74.5           21.4               11.5 +/-    1.91      24.5 +/-    1.91  0.050 / 0.050
G19     61.9           36.3                9.7 +/-    0.69      15.0 +/-    0.69  0.040 / 0.040
G24     239.0          31.2               13.1 +/-    2.24      22.3 +/-    2.24  0.150 / 0.180
G25     317.5          16.7                8.0 +/-    2.22      19.2 +/-    2.22  0.080 / 0.120