PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-20:28:00
G06     181.6          12.0               22.7 +/-    6.15      60.6 +/-    6.15  0.030 / 0.050
G07     141.1          17.2               17.2 +/-    1.52      40.5 +/-    1.52  0.030 / 0.050
G11     47.9           23.7                9.5 +/-    1.26      19.1 +/-    1.26  0.090 / 0.230
G13     262.6          36.2               15.2 +/-    1.21      23.6 +/-    1.21  0.050 / 0.170
G15     293.8          16.6               10.5 +/-    2.27      25.0 +/-    2.27  0.050 / 0.050
G17     255.9          76.6               14.5 +/-    0.79      14.9 +/-    0.79  0.050 / 0.050
G18     41.4           11.9                8.8 +/-    1.36      23.5 +/-    1.36  0.050 / 0.060
G19     231.0          50.3               16.2 +/-    0.82      20.3 +/-    0.82  0.060 / 0.070
G28     26.5           59.0               11.5 +/-    0.44      13.2 +/-    0.44  0.160 / 0.350
G30     142.9          51.4               14.7 +/-    0.61      18.2 +/-    0.61  0.180 / 0.410