PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-02:57:40
G07     333.3          58.0                3.1 +/-    0.44       3.6 +/-    0.44  0.150 / 0.150
G08     98.9           51.7                4.6 +/-    0.82       5.7 +/-    0.82  0.150 / 0.170
G09     193.3          74.4                6.6 +/-    0.76       6.8 +/-    0.76  0.040 / 0.040
G11     146.2          12.5                4.8 +/-    1.20      12.6 +/-    1.20  0.040 / 0.040
G16     46.4           11.0                3.0 +/-    1.40       8.2 +/-    1.40  0.220 / 0.330
G23     155.7          42.8                6.7 +/-    0.66       9.3 +/-    0.66  0.190 / 0.330
G27     54.5           31.0                2.8 +/-    2.33       4.8 +/-    2.33  0.060 / 0.080
G28     237.5          30.1                5.2 +/-    2.01       9.0 +/-    2.01  0.060 / 0.090
G30     302.7          36.2                4.5 +/-    1.71       7.0 +/-    1.71  0.030 / 0.030