PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-20:57:50
G02     6.5            71.4               13.7 +/-    0.57      14.4 +/-    0.57  0.060 / 0.080
G05     160.6          45.1               16.6 +/-    1.21      22.3 +/-    1.21  0.060 / 0.080
G06     46.6           27.8                9.6 +/-    2.05      17.7 +/-    2.05  0.030 / 0.060
G12     246.1          80.1               11.4 +/-    0.52      11.6 +/-    0.52  0.030 / 0.060
G19     88.3           17.4               12.5 +/-    1.20      29.4 +/-    1.20  0.160 / 0.390
G20     197.0          12.6               19.7 +/-    3.82      51.9 +/-    3.82  0.120 / 0.410
G24     220.0          14.0               16.0 +/-    3.41      40.8 +/-    3.41  0.030 / 0.040
G25     310.8          45.7               11.9 +/-    2.74      15.8 +/-    2.74  0.040 / 0.050
G29     296.8          18.2               11.1 +/-    0.71      25.5 +/-    0.71  0.060 / 0.150