PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-17:12:30
G07     22.6           67.4               10.2 +/-    0.85      11.0 +/-    0.85  0.040 / 0.040
G08     69.2           49.9               10.1 +/-    0.72      12.7 +/-    0.72  0.050 / 0.050
G09     181.9          56.1               12.4 +/-    0.57      14.6 +/-    0.57  0.030 / 0.040
G11     132.7          25.4               12.9 +/-    3.87      25.0 +/-    3.87  0.030 / 0.040
G23     159.4          23.9               11.1 +/-    2.23      22.3 +/-    2.23  0.080 / 0.110
G27     43.4           22.0                8.2 +/-    1.69      17.2 +/-    1.69  0.080 / 0.090
G28     250.7          38.2               13.1 +/-    2.02      19.7 +/-    2.02  0.200 / 0.260
G30     317.6          48.9               10.1 +/-    0.97      12.9 +/-    0.97  0.130 / 0.160