PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-16:57:40
G02     22.5           64.0               10.3 +/-    0.31      11.3 +/-    0.31  0.030 / 0.040
G05     158.0          50.7               13.9 +/-    0.62      17.4 +/-    0.62  0.030 / 0.040
G06     48.8           24.4                9.8 +/-    0.67      19.4 +/-    0.67  0.060 / 0.080
G12     224.6          77.1                9.9 +/-    0.88      10.1 +/-    0.88  0.060 / 0.060
G19     93.3           14.0               11.5 +/-    1.47      29.4 +/-    1.47  0.050 / 0.040
G20     197.6          17.2               13.6 +/-    1.02      32.0 +/-    1.02  0.050 / 0.040
G25     306.4          49.2               13.1 +/-    1.12      16.6 +/-    1.12  0.060 / 0.120
G29     302.4          24.6               11.3 +/-    1.05      22.2 +/-    1.05  0.050 / 0.110