PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-02:58:00
G01     123.1          14.6                6.9 +/-    1.50      17.5 +/-    1.50  0.030 / 0.040
G07     72.7           66.8                3.4 +/-    0.73       3.7 +/-    0.73  0.040 / 0.040
G08     46.2           33.1                1.9 +/-    0.46       3.2 +/-    0.46  0.090 / 0.240
G09     176.1          29.4                5.1 +/-    1.15       9.1 +/-    1.15  0.090 / 0.240
G11     110.5          38.2                5.0 +/-    0.91       7.5 +/-    0.91  0.110 / 0.440
G13     319.5          16.0                0.7 +/-    1.87       1.8 +/-    1.87  0.140 / 0.360
G17     199.4          22.1                4.8 +/-    1.36      10.0 +/-    1.36  0.050 / 0.060
G18     95.5           18.7                6.0 +/-    1.02      13.6 +/-    1.02  0.050 / 0.060
G28     281.1          53.7                5.6 +/-    1.02       6.8 +/-    1.02  0.030 / 0.040
G30     336.7          63.6                1.8 +/-    0.55       2.0 +/-    0.55  0.030 / 0.040