PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-06:58:00
G02     201.7          27.7                4.6 +/-    2.02       8.5 +/-    2.02  0.070 / 0.090
G06     168.9          60.9                5.3 +/-    0.75       6.0 +/-    0.75  0.060 / 0.070
G17     32.6           51.7                2.3 +/-    0.59       2.8 +/-    0.59  0.040 / 0.040
G19     338.8          69.0                4.1 +/-    0.64       4.4 +/-    0.64  0.050 / 0.040
G24     300.7          38.0                2.8 +/-    1.20       4.1 +/-    1.20  0.030 / 0.040
G28     94.7           37.1                5.0 +/-    0.59       7.7 +/-    0.59  0.040 / 0.040