PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-21:12:30
G07     10.0           66.6                7.9 +/-    0.91       8.6 +/-    0.91  0.040 / 0.050
G08     71.3           49.8                8.0 +/-    0.70      10.1 +/-    0.70  0.040 / 0.040
G09     181.6          58.1               10.4 +/-    0.37      12.0 +/-    0.37  0.100 / 0.120
G11     134.2          23.7               12.8 +/-    1.49      25.9 +/-    1.49  0.100 / 0.130
G23     159.7          28.1               11.5 +/-    1.00      21.0 +/-    1.00  0.060 / 0.110
G27     45.3           24.5                6.7 +/-    2.43      13.3 +/-    2.43  0.070 / 0.100
G28     248.7          37.3               11.9 +/-    1.65      18.1 +/-    1.65  0.050 / 0.040
G30     313.8          45.3                8.0 +/-    0.95      10.7 +/-    0.95  0.040 / 0.040