PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-05:57:40
G01     74.1           33.2                5.4 +/-    1.12       8.8 +/-    1.12  0.040 / 0.040
G07     135.7          33.1                8.6 +/-    0.55      14.1 +/-    0.55  0.030 / 0.040
G11     56.4           32.7                4.7 +/-    0.75       7.8 +/-    0.75  0.100 / 0.190
G13     279.7          37.2                6.8 +/-    1.08      10.3 +/-    1.08  0.090 / 0.200
G15     304.6          15.1                2.3 +/-    1.49       5.6 +/-    1.49  0.280 / 0.210
G17     229.3          67.5                9.8 +/-    0.64      10.5 +/-    0.64  0.040 / 0.080
G19     222.3          40.7               11.1 +/-    1.72      16.0 +/-    1.72  0.090 / 0.090
G28     15.9           59.6                5.2 +/-    0.79       6.0 +/-    0.79  0.090 / 0.100
G30     131.8          62.8                9.2 +/-    0.40      10.2 +/-    0.40  0.040 / 0.030