PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-17:58:10
G01     117.0          19.5               13.9 +/-    1.24      31.0 +/-    1.24  0.090 / 0.180
G07     86.0           65.6               12.0 +/-    0.26      13.0 +/-    0.26  0.100 / 0.210
G08     44.6           31.5                9.7 +/-    0.53      16.4 +/-    0.53  0.060 / 0.090
G09     176.7          23.6               13.9 +/-    2.22      28.0 +/-    2.22  0.050 / 0.090
G11     104.7          40.9               13.6 +/-    0.98      19.4 +/-    0.98  0.020 / 0.040
G13     316.5          21.2                8.0 +/-    2.61      17.1 +/-    2.61  0.030 / 0.040
G17     203.3          24.3               12.8 +/-    3.69      25.5 +/-    3.69  0.030 / 0.040
G18     92.1           21.8               11.2 +/-    1.24      23.6 +/-    1.24  0.040 / 0.040
G28     297.8          58.4               10.7 +/-    0.80      12.4 +/-    0.80  0.130 / 0.220
G30     353.6          71.2               11.8 +/-    1.30      12.4 +/-    1.30  0.110 / 0.210