PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-18:27:40
G01     121.9          15.0               14.7 +/-    1.83      36.5 +/-    1.83  0.030 / 0.040
G07     81.7           63.4               13.4 +/-    0.46      14.8 +/-    0.46  0.030 / 0.040
G08     46.6           34.3               10.6 +/-    0.60      17.1 +/-    0.60  0.030 / 0.040
G09     178.2          31.4               13.4 +/-    1.24      22.8 +/-    1.24  0.030 / 0.050
G11     110.2          38.9               13.8 +/-    0.75      20.4 +/-    0.75  0.050 / 0.080
G13     319.0          17.1               10.9 +/-    1.81      25.8 +/-    1.81  0.040 / 0.080
G17     200.1          20.9               14.1 +/-    1.38      30.3 +/-    1.38  0.080 / 0.200
G18     96.0           19.1               14.3 +/-    1.73      32.1 +/-    1.73  0.080 / 0.220
G28     279.7          52.5               14.3 +/-    0.50      17.5 +/-    0.50  0.150 / 0.340
G30     343.3          66.8               11.2 +/-    0.63      12.1 +/-    0.63  0.130 / 0.270