PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-19:27:50
G07     331.6          57.4               12.7 +/-    0.61      14.8 +/-    0.61  0.040 / 0.040
G08     107.2          52.6               15.5 +/-    0.51      18.9 +/-    0.51  0.040 / 0.050
G09     195.1          74.7               15.0 +/-    0.80      15.5 +/-    0.80  0.060 / 0.080
G11     147.8          12.3               19.8 +/-    3.78      52.4 +/-    3.78  0.060 / 0.070
G23     154.2          38.6               15.3 +/-    0.79      22.7 +/-    0.79  0.040 / 0.050
G27     54.9           31.4               11.3 +/-    1.43      19.2 +/-    1.43  0.040 / 0.040
G28     237.3          29.7               16.2 +/-    1.22      28.6 +/-    1.22  0.100 / 0.130