PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/29-11:57:50
G07     321.1          54.3                3.3 +/-    1.11       3.9 +/-    1.11  0.040 / 0.050
G08     121.7          45.5                7.4 +/-    1.28       9.9 +/-    1.28  0.030 / 0.050
G09     264.1          82.7                4.3 +/-    0.81       4.4 +/-    0.81  0.210 / 0.680
G16     43.4           17.9                2.3 +/-    1.04       5.3 +/-    1.04  0.190 / 0.510
G23     148.6          52.1                6.7 +/-    1.30       8.2 +/-    1.30  0.050 / 0.080
G27     70.7           36.8                4.0 +/-    0.64       6.2 +/-    0.64  0.040 / 0.080
G28     227.4          13.6                3.3 +/-    2.37       8.5 +/-    2.37  0.040 / 0.050
G30     292.9          28.9                3.1 +/-    1.29       5.6 +/-    1.29  0.040 / 0.060