PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-23:13:10
G01     127.5          11.4                4.9 +/-   45.91      13.3 +/-   45.91  0.040 / 0.050
G07     50.0           69.7               11.6 +/-    0.60      12.3 +/-    0.60  0.040 / 0.040
G08     52.3           42.3                8.3 +/-    0.46      11.7 +/-    0.46  0.050 / 0.060
G09     179.1          37.7               12.4 +/-    1.28      18.8 +/-    1.28  0.050 / 0.070
G11     122.4          34.3               14.8 +/-    1.02      23.8 +/-    1.02  0.080 / 0.300
G13     321.6          10.4               -8.5 +/-    9.77     -23.6 +/-    9.77  0.080 / 0.280
G17     200.6          12.8               16.1 +/-    5.77      42.1 +/-    5.77  0.180 / 0.250
G28     276.3          53.1               12.1 +/-    1.21      14.8 +/-    1.21  0.090 / 0.340
G30     338.7          63.2                9.9 +/-    0.68      10.9 +/-    0.68  0.020 / 0.040