PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-02:42:50
G07     53.8           68.7                3.8 +/-    0.41       4.1 +/-    0.41  0.030 / 0.040
G08     50.4           38.6                2.5 +/-    1.14       3.7 +/-    1.14  0.030 / 0.050
G09     176.7          36.4                6.6 +/-    0.80      10.2 +/-    0.80  0.090 / 0.200
G11     118.1          34.8                6.1 +/-    1.50       9.7 +/-    1.50  0.090 / 0.220
G17     198.5          15.4                3.5 +/-    2.57       8.6 +/-    2.57  0.150 / 0.270
G18     101.9          15.7                6.4 +/-    1.28      15.6 +/-    1.28  0.180 / 0.330
G23     161.5          11.3                4.4 +/-    1.46      12.0 +/-    1.46  0.060 / 0.080
G27     38.0           11.0                3.5 +/-    1.83       9.5 +/-    1.83  0.050 / 0.070
G28     270.9          50.1                3.5 +/-    1.33       4.4 +/-    1.33  0.040 / 0.040
G30     329.0          58.0                2.0 +/-    0.75       2.3 +/-    0.75  0.040 / 0.040