PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-22:27:50
G01     70.8           32.7                9.8 +/-    1.61      16.2 +/-    1.61  0.070 / 0.120
G07     136.9          26.4               11.5 +/-    1.00      21.9 +/-    1.00  0.080 / 0.140
G11     52.7           30.0                9.0 +/-    1.45      15.8 +/-    1.45  0.050 / 0.100
G13     274.1          38.3               10.3 +/-    1.84      15.5 +/-    1.84  0.050 / 0.110
G15     302.2          15.5                7.8 +/-    1.59      19.2 +/-    1.59  0.050 / 0.040
G17     232.5          70.6               10.4 +/-    0.55      11.0 +/-    0.55  0.030 / 0.040
G18     47.0           16.5                8.2 +/-    2.41      19.7 +/-    2.41  0.100 / 0.100
G19     223.3          41.5               11.0 +/-    2.04      15.7 +/-    2.04  0.120 / 0.100
G28     11.4           60.6                9.9 +/-    1.49      11.2 +/-    1.49  0.030 / 0.030
G30     135.3          61.5               11.1 +/-    0.45      12.5 +/-    0.45  0.030 / 0.030