PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-20:12:50
G01     70.6           32.6               11.8 +/-    0.55      19.5 +/-    0.55  0.040 / 0.040
G07     136.9          25.1               13.1 +/-    0.99      25.5 +/-    0.99  0.030 / 0.040
G11     52.8           30.3               11.4 +/-    0.66      19.9 +/-    0.66  0.060 / 0.120
G13     273.9          38.3               14.6 +/-    1.11      21.8 +/-    1.11  0.080 / 0.120
G15     302.0          15.6                9.0 +/-    2.09      22.0 +/-    2.09  0.030 / 0.050
G17     232.0          69.6               13.6 +/-    1.49      14.4 +/-    1.49  0.030 / 0.060
G18     47.5           17.0                9.4 +/-    1.04      22.4 +/-    1.04  0.090 / 0.240
G19     223.3          42.1               14.7 +/-    0.62      20.7 +/-    0.62  0.110 / 0.290
G28     10.2           60.7               10.8 +/-    0.64      12.2 +/-    0.64  0.060 / 0.070
G30     135.4          60.2               13.9 +/-    0.48      15.8 +/-    0.48  0.050 / 0.070