PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-13:43:00
G01     84.3           32.1                4.9 +/-    1.07       8.2 +/-    1.07  0.040 / 0.060
G07     129.1          38.4                7.7 +/-    0.63      11.5 +/-    0.63  0.040 / 0.050
G11     63.9           38.8                5.6 +/-    1.44       8.4 +/-    1.44  0.040 / 0.060
G13     288.9          38.1                4.0 +/-    2.06       6.0 +/-    2.06  0.050 / 0.060
G15     312.5          11.6                4.8 +/-    2.64      13.0 +/-    2.64  0.050 / 0.050
G17     216.9          54.0                7.8 +/-    0.77       9.3 +/-    0.77  0.040 / 0.050
G18     58.8           22.6                4.9 +/-    2.48      10.2 +/-    2.48  0.080 / 0.180
G19     215.5          32.1                5.2 +/-    1.63       8.7 +/-    1.63  0.100 / 0.170
G28     343.4          61.5                5.0 +/-    0.56       5.6 +/-    0.56  0.060 / 0.100
G30     117.1          72.1                7.2 +/-    0.71       7.5 +/-    0.71  0.050 / 0.070