PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-21:27:40
G07     334.7          59.0               10.1 +/-    0.50      11.6 +/-    0.50  0.060 / 0.070
G08     100.5          50.4               10.7 +/-    0.59      13.4 +/-    0.59  0.070 / 0.070
G09     196.8          76.9                9.8 +/-    0.34      10.1 +/-    0.34  0.190 / 0.210
G11     146.1          12.3               13.9 +/-    1.85      36.9 +/-    1.85  0.140 / 0.290
G16     45.5           12.9                5.8 +/-    3.77      15.2 +/-    3.77  0.040 / 0.040
G23     155.2          46.7               10.9 +/-    0.77      14.3 +/-    0.77  0.030 / 0.040
G27     60.5           34.9                9.8 +/-    1.12      15.5 +/-    1.12  0.030 / 0.030
G28     234.0          24.0               11.7 +/-    1.62      23.4 +/-    1.62  0.040 / 0.030
G30     299.3          32.9                9.3 +/-    2.10      15.3 +/-    2.10  0.050 / 0.050