Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2021   10:44:28   (  -0.01,-137.21) (   0.58,-139.96)  313.51                80
 12/23/2021   10:28:21   (  -0.01,-137.21) (  -0.40,-135.42)  203.24                80
 12/24/2021   22:47:37   (   0.02,-137.20) (  -0.75,-140.73)  401.89                80
 12/25/2021   22:31:30   (   0.02,-137.20) (   0.23,-136.19)  114.66                80
 12/27/2021   10:50:36   (  -0.02,-137.19) (   0.91,-141.46)  485.35                80
 12/28/2021   10:31:50   (  -0.01,-137.19) (  -0.07,-136.92)   30.76                80
 12/30/2021   22:34:58   (   0.00,-137.15) (  -0.14,-137.67)   59.98                80
 12/31/2021   22:18:52   (  -0.01,-137.13) (   0.90,-133.14)  455.52                80
 01/02/2022   10:40:38   (   0.01,-137.12) (   0.30,-138.40)  146.35                80
 01/03/2022   10:19:11   (   0.01,-137.09) (  -0.69,-133.86)  368.39                80
 01/04/2022   22:41:05   (  -0.01,-137.05) (  -0.50,-139.15)  239.84                80