PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-17:42:50
G01     305.7          34.0                6.9 +/-    2.17      11.2 +/-    2.17  0.060 / 0.120
G10     107.6          39.4                8.7 +/-    0.80      12.8 +/-    0.80  0.080 / 0.140
G11     282.2          27.6                7.9 +/-    0.89      14.5 +/-    0.89  0.100 / 0.110
G14     358.3          66.4                7.4 +/-    0.50       8.0 +/-    0.50  0.090 / 0.110
G22     310.3          27.5                7.2 +/-    1.25      13.2 +/-    1.25  0.080 / 0.090
G25     81.0           17.1                9.6 +/-    1.54      22.7 +/-    1.54  0.060 / 0.100
G31     165.5          66.7                9.0 +/-    0.51       9.7 +/-    0.51  0.040 / 0.030
G32     38.0           51.2                8.1 +/-    1.28      10.1 +/-    1.28  0.030 / 0.030