PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-20:57:50
G02     21.6           64.0                7.8 +/-    0.87       8.6 +/-    0.87  0.030 / 0.040
G05     154.1          54.3               11.1 +/-    0.90      13.3 +/-    0.90  0.030 / 0.030
G06     50.8           20.5                5.8 +/-    1.44      12.5 +/-    1.44  0.040 / 0.060
G12     207.3          73.7                9.5 +/-    1.10       9.8 +/-    1.10  0.040 / 0.060
G19     95.9           12.0               10.5 +/-    1.36      28.0 +/-    1.36  0.030 / 0.050
G20     197.1          21.2               12.8 +/-    2.11      27.3 +/-    2.11  0.040 / 0.050
G25     301.5          53.4               10.2 +/-    1.30      12.3 +/-    1.30  0.060 / 0.140
G29     303.5          24.6               10.3 +/-    1.31      20.4 +/-    1.31  0.070 / 0.150