PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-18:28:00
G08     268.2          18.1                9.8 +/-    1.48      22.6 +/-    1.48  0.250 / 0.250
G10     59.6           59.0                9.6 +/-    0.70      11.0 +/-    0.70  0.200 / 0.210
G11     312.4          16.2                8.3 +/-    2.50      20.1 +/-    2.50  0.250 / 0.210
G14     266.2          65.9               10.8 +/-    1.15      11.7 +/-    1.15  0.140 / 0.190
G18     92.5           34.9                9.8 +/-    0.83      15.5 +/-    0.83  0.090 / 0.100
G21     153.0          11.2               11.8 +/-    2.99      32.0 +/-    2.99  0.070 / 0.100
G24     40.3           11.3               10.6 +/-    2.92      28.7 +/-    2.92  0.030 / 0.020
G27     231.0          15.7               10.3 +/-    2.51      25.1 +/-    2.51  0.030 / 0.020
G31     179.4          28.9               11.5 +/-    1.03      20.7 +/-    1.03  0.040 / 0.040
G32     334.9          74.3               10.9 +/-    0.49      11.2 +/-    0.49  0.040 / 0.030