PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-22:57:40
G08     307.5          20.1               15.4 +/-    1.49      33.7 +/-    1.49  0.040 / 0.060
G10     332.1          59.9               12.3 +/-    1.23      14.0 +/-    1.23  0.040 / 0.060
G14     218.7          33.2               15.2 +/-    1.20      24.9 +/-    1.20  0.040 / 0.040
G18     40.3           58.9               12.6 +/-    0.48      14.4 +/-    0.48  0.070 / 0.050
G21     134.8          54.3               13.8 +/-    0.85      16.6 +/-    0.85  0.060 / 0.080
G24     74.4           30.6               12.9 +/-    0.57      22.4 +/-    0.57  0.050 / 0.090
G27     271.7          37.4               15.1 +/-    1.20      22.9 +/-    1.20  0.080 / 0.080
G32     224.4          49.8               14.7 +/-    0.62      18.6 +/-    0.62  0.060 / 0.060