PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-23:27:50
G01     116.3          20.0               11.6 +/-    1.42      25.6 +/-    1.42  0.040 / 0.050
G07     87.9           65.1                9.2 +/-    0.81      10.0 +/-    0.81  0.040 / 0.050
G08     44.5           31.2                6.8 +/-    1.03      11.7 +/-    1.03  0.160 / 0.200
G09     177.3          23.7               13.2 +/-    0.83      26.6 +/-    0.83  0.160 / 0.200
G11     106.7          41.2                9.1 +/-    0.70      12.9 +/-    0.70  0.150 / 0.100
G13     316.4          21.3                8.0 +/-    1.43      17.0 +/-    1.43  0.120 / 0.110
G17     203.2          26.1               11.9 +/-    2.31      22.7 +/-    2.31  0.070 / 0.080
G28     300.0          58.9                8.3 +/-    0.80       9.5 +/-    0.80  0.070 / 0.080
G30     5.3            73.5                9.5 +/-    0.90       9.9 +/-    0.90  0.060 / 0.050