PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-14:27:50
G01     99.7           28.9                9.4 +/-    0.95      16.9 +/-    0.95  0.030 / 0.030
G07     116.7          52.7               10.0 +/-    0.59      12.2 +/-    0.59  0.030 / 0.030
G08     41.7           13.8                5.7 +/-    1.01      14.6 +/-    1.01  0.060 / 0.140
G11     78.5           42.0                9.3 +/-    1.20      13.1 +/-    1.20  0.060 / 0.140
G13     303.3          32.8                9.7 +/-    1.30      16.1 +/-    1.30  0.030 / 0.040
G17     209.1          45.1               10.8 +/-    1.20      14.5 +/-    1.20  0.030 / 0.050
G18     72.3           24.6                8.6 +/-    0.51      17.0 +/-    0.51  0.050 / 0.050
G19     211.6          16.8                9.9 +/-    4.87      23.5 +/-    4.87  0.040 / 0.060
G28     332.0          61.8                8.3 +/-    0.56       9.3 +/-    0.56  0.040 / 0.080
G30     58.0           80.1                7.8 +/-    0.77       7.9 +/-    0.77  0.040 / 0.070