PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/23-17:27:30
G01     38.4           12.1                6.4 +/-    3.84      17.0 +/-    3.84  0.040 / 0.060
G02     199.7          11.5                6.1 +/-   17.41      16.4 +/-   17.41  0.050 / 0.060
G06     173.5          43.6               12.8 +/-    1.02      17.6 +/-    1.02  0.120 / 0.410
G13     232.7          19.3               11.7 +/-    3.16      26.2 +/-    3.16  0.200 / 0.310
G17     6.2            68.1                9.4 +/-    0.31      10.0 +/-    0.31  0.100 / 0.180
G19     294.3          71.6                8.8 +/-    0.54       9.2 +/-    0.54  0.100 / 0.190
G24     314.6          22.8                8.8 +/-    1.03      18.0 +/-    1.03  0.080 / 0.160
G28     72.2           48.8               10.3 +/-    0.84      13.2 +/-    0.84  0.250 / 0.210
G30     154.9          20.7                9.9 +/-    1.08      21.3 +/-    1.08  0.040 / 0.040