PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-20:42:40
G07     27.5           69.3               12.7 +/-    0.67      13.5 +/-    0.67  0.070 / 0.040
G08     61.2           48.9               11.4 +/-    0.95      14.5 +/-    0.95  0.060 / 0.060
G09     180.0          45.3               13.9 +/-    1.36      18.6 +/-    1.36  0.030 / 0.040
G11     128.6          29.9               13.6 +/-    1.13      23.9 +/-    1.13  0.030 / 0.040
G18     111.3          12.6               12.7 +/-    1.98      33.6 +/-    1.98  0.150 / 0.360
G23     159.3          12.1               15.6 +/-    3.37      41.5 +/-    3.37  0.170 / 0.400
G27     38.6           12.9                8.5 +/-    2.45      22.3 +/-    2.45  0.030 / 0.040
G28     265.5          48.9               12.2 +/-    4.60      15.6 +/-    4.60  0.030 / 0.040
G30     327.7          56.4               11.6 +/-    0.55      13.7 +/-    0.55  0.090 / 0.090