PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-19:58:10
G02     44.2           46.4                9.8 +/-    0.47      13.0 +/-    0.47  0.040 / 0.060
G05     117.1          70.7               11.3 +/-    0.33      11.9 +/-    0.33  0.050 / 0.060
G12     189.1          51.0               11.8 +/-    1.26      14.7 +/-    1.26  0.050 / 0.060
G20     200.5          42.3               13.6 +/-    0.67      19.1 +/-    0.67  0.030 / 0.060
G25     261.1          60.0               12.4 +/-    1.11      14.1 +/-    1.11  0.040 / 0.040
G29     318.7          41.7               11.6 +/-    1.42      16.5 +/-    1.42  0.030 / 0.040