PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-21:12:40
G02     20.4           64.6                8.6 +/-    0.69       9.4 +/-    0.69  0.040 / 0.060
G05     154.3          53.8               11.6 +/-    0.95      14.0 +/-    0.95  0.040 / 0.050
G06     50.5           20.9                6.3 +/-    1.34      13.5 +/-    1.34  0.030 / 0.050
G12     208.2          74.2               12.2 +/-    0.52      12.6 +/-    0.52  0.030 / 0.050
G19     95.4           12.3               12.0 +/-    1.74      31.8 +/-    1.74  0.090 / 0.140
G20     197.0          20.6               13.3 +/-    1.80      28.8 +/-    1.80  0.070 / 0.140
G25     302.4          52.7               11.7 +/-    1.23      14.3 +/-    1.23  0.030 / 0.030
G29     303.0          24.1               11.0 +/-    2.37      22.0 +/-    2.37  0.030 / 0.040