PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-02:28:20
G07     322.5          53.7                5.2 +/-    1.59       6.3 +/-    1.59  0.090 / 0.270
G08     111.5          48.8                8.1 +/-    0.79      10.4 +/-    0.79  0.090 / 0.370
G09     219.6          81.3                5.8 +/-    0.68       5.9 +/-    0.68  0.030 / 0.060
G16     44.0           17.1                2.3 +/-    0.95       5.4 +/-    0.95  0.040 / 0.060
G23     152.5          50.9                9.3 +/-    0.67      11.6 +/-    0.67  0.040 / 0.030
G27     62.4           34.4                4.6 +/-    0.49       7.3 +/-    0.49  0.030 / 0.030
G28     231.8          23.9                6.8 +/-    1.81      13.6 +/-    1.81  0.050 / 0.070
G30     296.5          31.3                5.6 +/-    1.09       9.5 +/-    1.09  0.040 / 0.080