PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/21-06:57:40
G01     40.0           15.0                3.5 +/-    2.17       8.7 +/-    2.17  0.060 / 0.090
G06     173.7          38.6                8.7 +/-    1.20      12.9 +/-    1.20  0.070 / 0.100
G13     236.6          23.1                6.7 +/-    2.25      13.7 +/-    2.25  0.100 / 0.300
G15     269.0          12.6                5.1 +/-    1.18      13.5 +/-    1.18  0.120 / 0.250
G17     1.5            71.0                7.2 +/-    0.82       7.6 +/-    0.82  0.040 / 0.040
G19     278.9          70.8                8.0 +/-    0.39       8.4 +/-    0.39  0.040 / 0.040
G24     316.9          17.3                6.0 +/-    2.31      14.1 +/-    2.31  0.040 / 0.070
G28     61.1           53.3                5.6 +/-    0.36       6.8 +/-    0.36  0.040 / 0.070
G30     155.6          31.7                9.1 +/-    1.29      15.4 +/-    1.29  0.090 / 0.300