PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-20:12:40
G07     137.9          23.4               16.1 +/-    1.87      32.6 +/-    1.87  0.040 / 0.060
G11     51.6           28.9               10.3 +/-    1.23      18.5 +/-    1.23  0.050 / 0.050
G13     271.4          38.0               15.0 +/-    0.58      22.5 +/-    0.58  0.100 / 0.170
G15     300.2          15.9                9.2 +/-    2.51      22.4 +/-    2.51  0.100 / 0.200
G17     235.7          71.3               14.0 +/-    0.98      14.7 +/-    0.98  0.030 / 0.050
G18     46.0           16.0                9.4 +/-    1.13      22.9 +/-    1.13  0.030 / 0.040
G19     224.7          43.9               17.1 +/-    0.67      23.5 +/-    0.67  0.070 / 0.080
G28     13.8           60.4               11.4 +/-    0.60      12.9 +/-    0.60  0.070 / 0.080
G30     137.3          58.3               14.7 +/-    0.61      16.9 +/-    0.61  0.140 / 0.350