PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-21:57:30
G02     36.6           51.9                8.8 +/-    1.01      10.9 +/-    1.01  0.050 / 0.020
G05     128.2          65.6                8.9 +/-    0.59       9.6 +/-    0.59  0.050 / 0.020
G06     55.7           12.9                6.6 +/-    1.36      17.3 +/-    1.36  0.050 / 0.070
G12     197.5          64.8                9.2 +/-    0.48      10.0 +/-    0.48  0.070 / 0.060
G25     290.4          55.6                6.8 +/-    1.58       8.1 +/-    1.58  0.030 / 0.010
G29     311.1          32.7                8.0 +/-    1.09      13.2 +/-    1.09  0.040 / 0.010