PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-05:42:40
G01     84.9           32.7                3.6 +/-    1.85       5.9 +/-    1.85  0.040 / 0.040
G07     129.3          41.1                5.7 +/-    0.51       8.2 +/-    0.51  0.030 / 0.040
G11     64.6           37.8                4.4 +/-    0.98       6.6 +/-    0.98  0.060 / 0.040
G13     290.8          36.3                6.4 +/-    1.93       9.8 +/-    1.93  0.080 / 0.050
G15     311.8          12.3                3.8 +/-    2.15      10.0 +/-    2.15  0.150 / 0.140
G17     218.3          59.0                6.7 +/-    1.28       7.7 +/-    1.28  0.180 / 0.210
G19     216.8          32.4                5.5 +/-    2.83       9.1 +/-    2.83  0.040 / 0.050
G28     359.3          61.2                3.7 +/-    0.54       4.2 +/-    0.54  0.060 / 0.050
G30     117.3          70.9                5.7 +/-    0.95       5.9 +/-    0.95  0.050 / 0.090