PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-22:43:10
G01     125.9          12.2                3.6 +/-   28.13       9.7 +/-   28.13  0.060 / 0.090
G07     66.3           67.0               10.4 +/-    0.43      11.2 +/-    0.43  0.080 / 0.090
G08     48.6           36.6                9.1 +/-    1.18      14.1 +/-    1.18  0.110 / 0.080
G09     177.9          35.1               10.8 +/-    1.38      17.0 +/-    1.38  0.160 / 0.100
G11     114.9          36.5               11.2 +/-    0.75      17.3 +/-    0.75  0.030 / 0.040
G13     320.6          13.2               -2.0 +/-   16.03      -5.2 +/-   16.03  0.030 / 0.040
G17     199.0          17.9               11.6 +/-    2.60      27.0 +/-    2.60  0.130 / 0.330
G18     98.8           17.1                9.7 +/-    1.27      22.9 +/-    1.27  0.090 / 0.340
G28     274.2          51.0               11.0 +/-    3.56      13.6 +/-    3.56  0.040 / 0.050
G30     333.7          61.4                8.9 +/-    0.69      10.0 +/-    0.69  0.070 / 0.060