PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-04:58:00
G01     71.1           32.9                2.0 +/-    0.95       3.3 +/-    0.95  0.030 / 0.040
G07     137.2          31.0                6.1 +/-    1.11      10.4 +/-    1.11  0.030 / 0.040
G11     54.7           31.5                3.2 +/-    1.15       5.4 +/-    1.15  0.040 / 0.090
G13     276.3          37.1                4.7 +/-    2.12       7.3 +/-    2.12  0.040 / 0.100
G15     302.2          15.7                2.0 +/-    1.19       4.8 +/-    1.19  0.030 / 0.020
G17     233.4          69.2                6.1 +/-    0.45       6.5 +/-    0.45  0.030 / 0.030
G19     224.1          42.9                6.6 +/-    1.72       9.2 +/-    1.72  0.090 / 0.210
G28     20.4           59.1                2.5 +/-    2.72       2.9 +/-    2.72  0.090 / 0.200
G30     134.7          59.6                5.2 +/-    0.74       5.9 +/-    0.74  0.040 / 0.110