PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-03:58:30
G01     127.9          11.0               -0.0 +/-   32.07      -0.0 +/-   32.07  0.050 / 0.070
G07     50.4           69.3                6.8 +/-    0.51       7.2 +/-    0.51  0.050 / 0.060
G08     51.3           40.3                5.2 +/-    0.92       7.6 +/-    0.92  0.030 / 0.040
G09     178.7          37.8               11.6 +/-    1.00      17.6 +/-    1.00  0.030 / 0.040
G11     120.1          33.9                9.5 +/-    0.67      15.4 +/-    0.67  0.050 / 0.070
G17     199.6          14.7                4.8 +/-    3.04      12.1 +/-    3.04  0.050 / 0.060
G28     275.6          52.9                8.2 +/-    1.08      10.0 +/-    1.08  0.190 / 0.260
G30     334.3          60.9                6.4 +/-    0.86       7.2 +/-    0.86  0.190 / 0.330