PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-14:57:40
G01     104.2          26.7               11.1 +/-    1.02      20.9 +/-    1.02  0.070 / 0.160
G07     112.0          52.7                9.0 +/-    0.56      11.0 +/-    0.56  0.100 / 0.190
G08     41.6           16.5                6.9 +/-    1.17      16.6 +/-    1.17  0.040 / 0.040
G09     173.4          10.4                9.7 +/-    1.55      26.7 +/-    1.55  0.030 / 0.030
G11     82.7           40.3                8.9 +/-    0.57      12.9 +/-    0.57  0.060 / 0.100
G13     309.1          28.5                7.0 +/-    1.46      12.6 +/-    1.46  0.070 / 0.100
G17     206.2          42.8               10.6 +/-    1.45      14.7 +/-    1.45  0.040 / 0.060
G19     209.5          16.8                9.3 +/-    2.16      22.2 +/-    2.16  0.040 / 0.050
G28     322.8          61.1                8.7 +/-    1.14       9.8 +/-    1.14  0.050 / 0.070
G30     21.7           78.3                8.7 +/-    0.67       8.9 +/-    0.67  0.050 / 0.060