PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-18:57:40
G02     252.1          77.1                8.9 +/-    0.69       9.1 +/-    0.69  0.070 / 0.210
G05     170.3          19.6               14.0 +/-    2.06      31.1 +/-    2.06  0.060 / 0.200
G06     40.4           52.5                9.2 +/-    0.60      11.2 +/-    0.60  0.040 / 0.050
G12     322.2          59.8                8.6 +/-    0.96       9.7 +/-    0.96  0.050 / 0.060
G17     74.3           19.8                9.0 +/-    0.89      19.9 +/-    0.89  0.180 / 0.420
G19     58.9           38.6                8.3 +/-    0.52      12.4 +/-    0.52  0.120 / 0.300
G24     239.6          32.2               13.2 +/-    1.66      22.1 +/-    1.66  0.030 / 0.040
G25     317.2          16.1                7.7 +/-    2.08      18.6 +/-    2.08  0.030 / 0.050