PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-00:12:40
G01     95.5           30.5                9.4 +/-    0.69      16.3 +/-    0.69  0.030 / 0.060
G07     120.9          49.8               11.0 +/-    0.55      13.9 +/-    0.55  0.050 / 0.050
G08     42.1           13.7                4.7 +/-    1.62      12.1 +/-    1.62  0.030 / 0.060
G11     77.9           43.0                8.8 +/-    0.72      12.3 +/-    0.72  0.040 / 0.070
G13     300.3          33.8                9.0 +/-    1.75      14.7 +/-    1.75  0.090 / 0.160
G17     212.0          46.9               12.6 +/-    1.51      16.6 +/-    1.51  0.070 / 0.140
G19     212.7          23.1               14.0 +/-    2.60      28.7 +/-    2.60  0.060 / 0.110
G28     341.4          61.9                8.0 +/-    0.76       9.0 +/-    0.76  0.070 / 0.120
G30     96.0           75.3               11.0 +/-    0.34      11.3 +/-    0.34  0.040 / 0.060