PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-20:28:00
G01     117.9          18.9               15.5 +/-    2.06      35.1 +/-    2.06  0.040 / 0.060
G07     83.3           66.2               14.0 +/-    0.48      15.2 +/-    0.48  0.050 / 0.070
G08     45.7           34.3               10.2 +/-    0.80      16.5 +/-    0.80  0.110 / 0.160
G09     177.3          25.2               14.8 +/-    1.52      28.7 +/-    1.52  0.130 / 0.240
G11     107.4          40.5               13.3 +/-    0.92      19.2 +/-    0.92  0.030 / 0.030
G13     317.2          20.1               11.0 +/-    1.85      24.1 +/-    1.85  0.030 / 0.030
G17     203.4          22.0               15.9 +/-    0.98      33.3 +/-    0.98  0.040 / 0.040
G18     93.4           21.4               11.8 +/-    2.59      25.1 +/-    2.59  0.030 / 0.030
G28     296.2          58.1               12.6 +/-    1.04      14.5 +/-    1.04  0.130 / 0.200
G30     354.9          71.2               13.9 +/-    0.55      14.7 +/-    0.55  0.100 / 0.210