PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/21-05:58:00
G01     62.0           30.3                3.1 +/-    0.57       5.4 +/-    0.57  0.040 / 0.040
G06     180.0          11.8                4.1 +/-    2.99      11.0 +/-    2.99  0.040 / 0.040
G07     140.1          25.7                8.5 +/-    0.72      16.3 +/-    0.72  0.090 / 0.210
G11     51.2           30.1                4.3 +/-    0.81       7.6 +/-    0.81  0.090 / 0.160
G13     265.4          37.5                8.8 +/-    1.27      13.3 +/-    1.27  0.060 / 0.140
G15     294.9          17.0                3.7 +/-    1.01       8.7 +/-    1.01  0.060 / 0.180
G17     244.8          74.4                8.9 +/-    0.85       9.2 +/-    0.85  0.040 / 0.050
G19     228.1          49.8                9.1 +/-    0.50      11.5 +/-    0.50  0.040 / 0.060
G28     13.3           60.8                5.5 +/-    0.72       6.2 +/-    0.72  0.040 / 0.060
G30     141.9          60.0                8.2 +/-    1.36       9.3 +/-    1.36  0.040 / 0.060