PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-17:42:40
G07     3.2            66.3                9.2 +/-    0.64      10.0 +/-    0.64  0.040 / 0.040
G08     73.3           52.4               11.8 +/-    0.77      14.4 +/-    0.77  0.030 / 0.040
G09     181.2          55.1               13.3 +/-    0.54      15.8 +/-    0.54  0.030 / 0.030
G11     135.0          24.1               14.7 +/-    3.80      29.3 +/-    3.80  0.020 / 0.040
G23     157.8          19.4               14.5 +/-    1.30      32.4 +/-    1.30  0.060 / 0.060
G27     42.4           20.3                8.9 +/-    1.78      19.5 +/-    1.78  0.040 / 0.060
G28     253.8          42.6               12.4 +/-    1.84      17.3 +/-    1.84  0.100 / 0.240
G30     317.2          48.1                8.4 +/-    0.66      10.8 +/-    0.66  0.100 / 0.210