PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-06:27:50
G02     200.1          18.0                4.4 +/-    1.25      10.3 +/-    1.25  0.070 / 0.110
G06     173.4          49.8                6.6 +/-    1.41       8.4 +/-    1.41  0.060 / 0.100
G13     228.4          14.8                5.1 +/-    1.51      12.9 +/-    1.51  0.050 / 0.100
G17     22.9           59.6                5.0 +/-    0.44       5.7 +/-    0.44  0.040 / 0.090
G19     307.1          70.7                5.5 +/-    0.69       5.8 +/-    0.69  0.060 / 0.050
G24     309.1          31.6                4.4 +/-    1.43       7.4 +/-    1.43  0.080 / 0.060
G28     83.5           42.9                6.5 +/-    0.57       9.0 +/-    0.57  0.150 / 0.350
G30     157.3          18.1                6.2 +/-    2.03      14.4 +/-    2.03  0.120 / 0.430