PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-19:27:50
G01     82.0           32.7               12.6 +/-    0.73      20.9 +/-    0.73  0.040 / 0.100
G07     131.1          33.4               14.9 +/-    1.40      24.4 +/-    1.40  0.050 / 0.100
G11     60.5           36.4               11.4 +/-    0.51      17.7 +/-    0.51  0.050 / 0.060
G13     286.2          38.3               12.5 +/-    0.82      18.7 +/-    0.82  0.040 / 0.050
G15     310.0          13.0                9.5 +/-    1.67      24.7 +/-    1.67  0.070 / 0.110
G17     218.9          60.3               14.8 +/-    0.92      16.8 +/-    0.92  0.060 / 0.100
G18     55.6           21.1                9.1 +/-    0.90      19.4 +/-    0.90  0.060 / 0.120
G19     217.1          33.3               17.7 +/-    4.11      29.0 +/-    4.11  0.060 / 0.120
G28     351.6          61.6               10.6 +/-    0.72      11.9 +/-    0.72  0.080 / 0.250
G30     122.5          69.0               13.2 +/-    1.03      14.1 +/-    1.03  0.080 / 0.260