PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-11:57:40
G07     51.1           68.5                4.1 +/-    1.11       4.3 +/-    1.11  0.030 / 0.030
G08     56.0           45.3                3.5 +/-    1.39       4.7 +/-    1.39  0.030 / 0.030
G09     178.9          41.3                4.4 +/-    0.75       6.3 +/-    0.75  0.220 / 0.260
G11     122.6          33.9                5.0 +/-    2.30       8.1 +/-    2.30  0.180 / 0.240
G18     106.3          14.7                5.0 +/-    2.38      12.5 +/-    2.38  0.150 / 0.120
G27     37.9           11.0                5.0 +/-    2.05      13.7 +/-    2.05  0.090 / 0.080
G28     264.5          45.6                5.4 +/-    3.28       7.2 +/-    3.28  0.070 / 0.090
G30     329.5          58.3                3.8 +/-    0.65       4.3 +/-    0.65  0.070 / 0.080