PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-04:13:10
G01     81.5           33.0                3.9 +/-    1.06       6.4 +/-    1.06  0.040 / 0.070
G07     131.5          36.7                5.7 +/-    0.84       8.8 +/-    0.84  0.040 / 0.070
G11     59.4           35.2                2.5 +/-    0.49       4.0 +/-    0.49  0.090 / 0.310
G13     285.5          38.0                4.2 +/-    1.05       6.4 +/-    1.05  0.090 / 0.250
G15     311.0          12.0                1.6 +/-    2.36       4.3 +/-    2.36  0.080 / 0.100
G17     220.1          63.6                6.4 +/-    0.60       7.1 +/-    0.60  0.070 / 0.080
G18     53.6           19.8                2.2 +/-    2.16       4.8 +/-    2.16  0.050 / 0.060
G19     218.0          31.8                6.1 +/-    1.20      10.2 +/-    1.20  0.040 / 0.070
G28     358.1          61.4                3.7 +/-    0.88       4.1 +/-    0.88  0.030 / 0.040
G30     122.1          71.8                5.5 +/-    0.59       5.8 +/-    0.59  0.030 / 0.030