PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-19:57:40
G02     81.2           16.9                8.1 +/-    0.72      19.2 +/-    0.72  0.070 / 0.160
G05     44.4           35.0                8.2 +/-    0.86      13.0 +/-    0.86  0.060 / 0.140
G13     99.5           31.7               11.2 +/-    0.71      19.0 +/-    0.71  0.040 / 0.090
G15     146.9          36.5               11.8 +/-    1.25      18.1 +/-    1.25  0.040 / 0.080
G20     233.4          21.7               13.8 +/-    1.47      29.2 +/-    1.47  0.080 / 0.150
G21     295.3          33.7               10.4 +/-    1.43      16.9 +/-    1.43  0.080 / 0.130
G25     210.8          28.4               10.2 +/-    3.15      18.5 +/-    3.15  0.080 / 0.170
G26     307.0          17.5               10.2 +/-    0.91      23.9 +/-    0.91  0.080 / 0.210
G29     6.9            83.5                9.3 +/-    0.50       9.3 +/-    0.50  0.020 / 0.030