Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/12/2021   22:18:51   (  -0.04,-137.20) (   0.88,-133.16)  460.78                80
 10/14/2021   10:38:00   (   0.03,-137.21) (   0.28,-138.43)  138.71                80
 10/15/2021   10:21:55   (   0.02,-137.21) (  -0.73,-133.90)  377.68                80
 10/16/2021   22:41:11   (  -0.02,-137.20) (  -0.47,-139.20)  227.93                80
 10/17/2021   22:25:07   (  -0.02,-137.19) (   0.55,-134.66)  288.48                80
 10/19/2021   10:44:15   (   0.02,-137.20) (   0.61,-139.93)  311.12                80
 10/20/2021   10:28:11   (   0.02,-137.20) (  -0.40,-135.40)  205.11                80
 10/21/2021   22:47:27   (  -0.02,-137.18) (  -0.78,-140.70)  401.07                80
 10/22/2021   22:31:22   (  -0.02,-137.17) (   0.18,-136.16)  114.76                80
 10/24/2021   10:50:30   (   0.02,-137.17) (   0.98,-141.43)  486.19                80
 10/25/2021   10:34:25   (   0.02,-137.16) (  -0.04,-136.90)   29.04                80