PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-05:28:10
G01     96.9           29.9                7.5 +/-    0.85      13.1 +/-    0.85  0.040 / 0.040
G07     119.5          50.0                7.8 +/-    1.01       9.8 +/-    1.01  0.030 / 0.040
G08     41.9           12.1                2.8 +/-    1.42       7.4 +/-    1.42  0.030 / 0.050
G11     76.8           41.5                5.5 +/-    1.45       7.9 +/-    1.45  0.030 / 0.040
G13     302.2          32.7                2.1 +/-    1.05       3.5 +/-    1.05  0.070 / 0.190
G17     210.5          48.6                7.0 +/-    0.66       8.9 +/-    0.66  0.140 / 0.240
G19     212.0          22.8                5.4 +/-    1.99      11.2 +/-    1.99  0.030 / 0.030
G28     338.8          61.8                3.0 +/-    0.43       3.4 +/-    0.43  0.030 / 0.040
G30     82.6           77.9                5.0 +/-    0.56       5.1 +/-    0.56  0.070 / 0.100