PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-20:12:00
G02     45.3           44.6                8.7 +/-    1.70      11.7 +/-    1.70  0.040 / 0.070
G05     97.4           69.5               11.0 +/-    1.02      11.7 +/-    1.02  0.040 / 0.050
G12     189.3          51.8               11.4 +/-    0.41      14.0 +/-    0.41  0.070 / 0.070
G25     268.9          58.2               10.8 +/-    1.78      12.5 +/-    1.78  0.070 / 0.070
G29     318.3          40.6                9.6 +/-    1.95      13.8 +/-    1.95  0.040 / 0.050