PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-06:12:40
G01     72.6           33.1                3.1 +/-    1.33       5.1 +/-    1.33  0.040 / 0.040
G07     136.5          31.9                8.5 +/-    0.66      14.4 +/-    0.66  0.040 / 0.040
G11     55.3           31.8                3.7 +/-    0.84       6.3 +/-    0.84  0.030 / 0.030
G13     278.1          37.1                3.7 +/-    1.66       5.6 +/-    1.66  0.040 / 0.030
G15     303.5          15.4                1.4 +/-    0.76       3.4 +/-    0.76  0.080 / 0.180
G17     231.4          68.7                6.5 +/-    0.42       6.9 +/-    0.42  0.090 / 0.210
G19     223.2          41.9                7.1 +/-    2.01      10.0 +/-    2.01  0.070 / 0.070
G28     18.1           59.3                4.3 +/-    1.27       4.9 +/-    1.27  0.040 / 0.080
G30     133.3          61.7                6.6 +/-    0.66       7.4 +/-    0.66  0.050 / 0.060