PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-06:42:40
G01     50.5           25.6                5.5 +/-    2.58      10.5 +/-    2.58  0.050 / 0.040
G06     181.4          20.6                4.9 +/-    1.62      10.7 +/-    1.62  0.030 / 0.050
G07     146.1          12.4                4.0 +/-    0.80      10.7 +/-    0.80  0.020 / 0.020
G11     44.9           15.7                3.6 +/-    1.80       8.7 +/-    1.80  0.020 / 0.020
G13     252.4          30.5                9.3 +/-    1.70      16.1 +/-    1.70  0.060 / 0.110
G15     283.5          16.1                7.3 +/-    1.06      17.8 +/-    1.06  0.080 / 0.110
G17     317.2          78.7                6.1 +/-    0.63       6.2 +/-    0.63  0.080 / 0.170
G19     247.3          61.0                8.1 +/-    0.72       9.2 +/-    0.72  0.110 / 0.180
G28     52.9           52.6                6.1 +/-    1.00       7.5 +/-    1.00  0.090 / 0.180
G30     148.9          40.1                8.4 +/-    1.55      12.1 +/-    1.55  0.100 / 0.140