PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-23:43:10
G01     128.4          10.6              -13.3 +/-   37.46     -36.6 +/-   37.46  0.050 / 0.070
G07     46.3           69.7                7.4 +/-    1.17       7.8 +/-    1.17  0.050 / 0.080
G08     53.2           42.9                5.7 +/-    0.64       8.0 +/-    0.64  0.170 / 0.210
G09     179.3          39.0               10.6 +/-    1.32      15.7 +/-    1.32  0.060 / 0.260
G11     123.3          33.5               10.1 +/-    0.99      16.6 +/-    0.99  0.050 / 0.050
G17     200.3          12.0                8.9 +/-   17.54      23.7 +/-   17.54  0.040 / 0.050
G28     274.4          52.5                8.9 +/-    0.98      10.9 +/-    0.98  0.170 / 0.380
G30     337.9          62.7                5.3 +/-    0.76       5.9 +/-    0.76  0.170 / 0.350