PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-06:58:10
G02     212.5          55.4                5.6 +/-    0.44       6.6 +/-    0.44  0.040 / 0.070
G06     84.2           80.0                4.1 +/-    0.51       4.1 +/-    0.51  0.060 / 0.080
G12     316.3          30.7                3.4 +/-    1.17       5.9 +/-    1.17  0.080 / 0.230
G17     54.9           33.0                2.5 +/-    0.46       4.2 +/-    0.46  0.130 / 0.310
G19     30.9           53.7                3.2 +/-    0.54       3.9 +/-    0.54  0.040 / 0.030
G24     266.5          43.5                3.3 +/-    0.63       4.6 +/-    0.63  0.040 / 0.020
G28     118.5          19.4                6.9 +/-    0.84      15.4 +/-    0.84  0.070 / 0.110