PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-19:57:50
G07     10.2           66.6               12.0 +/-    0.81      13.0 +/-    0.81  0.030 / 0.040
G08     72.6           50.3               11.3 +/-    1.23      14.2 +/-    1.23  0.040 / 0.040
G09     182.3          59.2               13.3 +/-    0.52      15.3 +/-    0.52  0.110 / 0.190
G11     134.8          23.3               13.6 +/-    1.08      27.7 +/-    1.08  0.100 / 0.130
G23     159.5          28.3               12.6 +/-    1.28      22.8 +/-    1.28  0.110 / 0.100
G27     45.5           24.7               10.2 +/-    2.26      20.1 +/-    2.26  0.060 / 0.100
G28     247.9          36.6               13.3 +/-    1.90      20.5 +/-    1.90  0.060 / 0.060
G30     313.7          45.3               11.4 +/-    0.97      15.3 +/-    0.97  0.060 / 0.060