PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-17:12:40
G01     44.9           21.1                9.5 +/-    2.67      20.4 +/-    2.67  0.040 / 0.070
G06     176.4          30.4               14.8 +/-    1.44      25.6 +/-    1.44  0.040 / 0.050
G11     43.5           10.0               10.5 +/-    5.14      29.3 +/-    5.14  0.150 / 0.630
G13     243.3          27.5               14.0 +/-    1.80      25.8 +/-    1.80  0.120 / 0.620
G15     277.3          14.5               13.3 +/-    0.74      33.4 +/-    0.74  0.220 / 0.110
G17     333.6          76.6               14.5 +/-    0.40      14.8 +/-    0.40  0.150 / 0.100
G19     258.1          65.6               15.2 +/-    0.69      16.5 +/-    0.69  0.090 / 0.180
G24     318.2          12.8                8.8 +/-   14.03      23.0 +/-   14.03  0.100 / 0.200
G28     54.2           54.1               13.7 +/-    1.09      16.5 +/-    1.09  0.030 / 0.010
G30     151.5          32.7               13.8 +/-    1.45      22.9 +/-    1.45  0.030 / 0.010