PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-05:27:50
G01     81.8           33.1                3.8 +/-    0.91       6.3 +/-    0.91  0.040 / 0.040
G07     131.3          38.9                7.8 +/-    0.66      11.5 +/-    0.66  0.040 / 0.050
G11     62.1           36.6                3.9 +/-    0.76       6.1 +/-    0.76  0.100 / 0.190
G13     287.7          36.8                6.0 +/-    0.85       9.2 +/-    0.85  0.100 / 0.190
G15     309.8          13.2                2.0 +/-    2.92       5.3 +/-    2.92  0.050 / 0.040
G17     220.9          61.3                6.6 +/-    1.16       7.4 +/-    1.16  0.050 / 0.040
G19     218.2          34.7                5.5 +/-    1.55       8.8 +/-    1.55  0.050 / 0.080
G28     4.2            60.8                3.4 +/-    0.64       3.9 +/-    0.64  0.050 / 0.100
G30     122.5          68.5                5.8 +/-    0.56       6.2 +/-    0.56  0.050 / 0.070