PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-18:12:50
G01     111.2          23.3               12.7 +/-    1.49      25.8 +/-    1.49  0.080 / 0.200
G07     99.4           61.7               11.4 +/-    0.65      12.8 +/-    0.65  0.070 / 0.210
G08     42.9           26.0               10.0 +/-    0.76      19.1 +/-    0.76  0.040 / 0.070
G09     175.7          17.5               12.1 +/-    1.37      28.4 +/-    1.37  0.040 / 0.070
G11     96.1           42.6               12.3 +/-    0.57      17.2 +/-    0.57  0.030 / 0.040
G13     312.8          25.8               12.2 +/-    3.22      23.5 +/-    3.22  0.030 / 0.040
G17     205.2          30.7               13.8 +/-    2.24      23.9 +/-    2.24  0.030 / 0.040
G18     85.3           23.6                8.9 +/-    1.03      18.1 +/-    1.03  0.030 / 0.040
G28     310.0          60.2               11.3 +/-    0.55      12.8 +/-    0.55  0.100 / 0.240
G30     10.8           75.9               12.6 +/-    0.37      12.9 +/-    0.37  0.100 / 0.200