PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-08:28:10
G02     218.7          62.4                6.5 +/-    1.30       7.2 +/-    1.30  0.060 / 0.080
G06     53.5           73.8                5.1 +/-    0.31       5.3 +/-    0.31  0.060 / 0.080
G12     319.0          37.9                2.5 +/-    1.15       3.7 +/-    1.15  0.040 / 0.060
G17     60.9           28.3                2.9 +/-    1.02       5.2 +/-    1.02  0.030 / 0.070
G19     39.7           49.2                3.3 +/-    0.28       4.2 +/-    0.28  0.040 / 0.030
G24     255.6          41.4                5.3 +/-    0.64       7.5 +/-    0.64  0.030 / 0.040
G28     123.7          13.6                7.2 +/-    2.08      18.6 +/-    2.08  0.170 / 0.390