Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2021   22:34:59   (   0.02,-137.22) (  -0.08,-137.68)   52.92                80
 12/31/2021   22:18:52   (   0.02,-137.22) (   0.91,-133.14)  463.91                80
 01/02/2022   10:37:59   (  -0.01,-137.21) (   0.23,-138.41)  136.47                80
 01/03/2022   10:21:52   (  -0.00,-137.20) (  -0.76,-133.87)  379.90                80
 01/04/2022   22:41:07   (   0.01,-137.19) (  -0.44,-139.17)  225.34                80
 01/05/2022   22:25:00   (   0.01,-137.18) (   0.55,-134.62)  290.81                80
 01/07/2022   10:44:06   (  -0.01,-137.17) (   0.58,-139.90)  310.18                80
 01/08/2022   10:28:00   (  -0.01,-137.16) (  -0.40,-135.36)  205.86                80
 01/09/2022   22:47:14   (   0.01,-137.15) (  -0.78,-140.65)  399.71                80
 01/10/2022   22:31:09   (   0.01,-137.14) (   0.26,-136.12)  116.29                80
 01/12/2022   10:50:14   (   0.00,-137.12) (   0.92,-141.38)  485.06                80
 01/13/2022   10:34:08   (   0.01,-137.11) (  -0.06,-136.84)   30.48                80