PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-17:27:50
G01     319.9          15.2                7.0 +/-    2.61      17.3 +/-    2.61  0.180 / 0.290
G08     261.4          14.7                6.8 +/-    1.40      17.0 +/-    1.40  0.110 / 0.230
G10     74.0           55.4                8.9 +/-    0.80      10.5 +/-    0.80  0.040 / 0.060
G11     307.1          20.4                7.0 +/-    1.33      15.3 +/-    1.33  0.040 / 0.060
G14     285.9          69.3               10.4 +/-    0.83      11.0 +/-    0.83  0.030 / 0.020
G18     100.0          29.3               10.1 +/-    1.20      18.0 +/-    1.20  0.020 / 0.020
G31     177.3          38.0               12.6 +/-    1.24      19.0 +/-    1.24  0.040 / 0.040
G32     0.2            69.7                9.4 +/-    0.30       9.9 +/-    0.30  0.030 / 0.040