PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-21:42:30
G02     33.3           55.6               12.5 +/-    0.56      14.7 +/-    0.56  0.030 / 0.060
G05     138.3          64.6               14.5 +/-    1.09      15.8 +/-    1.09  0.050 / 0.050
G06     56.6           12.2                9.2 +/-    1.33      24.4 +/-    1.33  0.030 / 0.040
G12     192.6          61.6               14.7 +/-    0.94      16.4 +/-    0.94  0.030 / 0.040
G20     198.2          32.1               13.7 +/-    1.25      23.1 +/-    1.25  0.040 / 0.060
G25     283.3          59.3               12.8 +/-    0.60      14.7 +/-    0.60  0.040 / 0.050
G29     311.0          32.5               11.9 +/-    1.39      19.8 +/-    1.39  0.040 / 0.100