PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-19:42:40
G02     17.5           66.7               11.1 +/-    0.58      12.0 +/-    0.58  0.040 / 0.040
G05     159.0          49.4               12.6 +/-    0.77      16.0 +/-    0.77  0.040 / 0.040
G06     48.6           24.2                9.5 +/-    2.15      18.9 +/-    2.15  0.340 / 0.590
G12     223.7          77.6                8.7 +/-    1.00       8.8 +/-    1.00  0.240 / 0.370
G19     92.4           14.6                9.8 +/-    2.30      24.7 +/-    2.30  0.030 / 0.020
G20     197.1          16.9               13.7 +/-    3.51      32.5 +/-    3.51  0.020 / 0.020
G24     216.7          10.7               12.2 +/-    1.68      33.5 +/-    1.68  0.080 / 0.080
G25     306.4          50.0               11.3 +/-    2.37      14.3 +/-    2.37  0.120 / 0.100
G29     300.7          22.2               11.6 +/-    1.78      24.2 +/-    1.78  0.090 / 0.160