PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-19:27:50
G02     231.6          69.0               16.1 +/-    0.36      17.1 +/-    0.36  0.050 / 0.030
G05     175.2          11.6               13.3 +/-   24.28      35.8 +/-   24.28  0.040 / 0.040
G06     42.0           60.8                9.5 +/-   15.59      10.7 +/-   15.59  0.030 / 0.040
G12     322.0          50.7               15.3 +/-    0.95      19.1 +/-    0.95  0.030 / 0.040
G17     70.4           21.7               12.0 +/-    1.87      25.3 +/-    1.87  0.150 / 0.330
G19     56.4           38.6                2.5 +/-   40.89       3.7 +/-   40.89  0.140 / 0.340
G24     250.5          36.7               16.1 +/-    1.88      24.8 +/-    1.88  0.060 / 0.090
G25     316.5          14.2               12.2 +/-    3.29      31.0 +/-    3.29  0.070 / 0.090