Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/04/2021   10:28:07   (   0.04,-137.21) (  -0.36,-135.41)  205.45                80
 10/05/2021   22:47:25   (  -0.03,-137.22) (  -0.79,-140.72)  398.96                80
 10/06/2021   22:31:20   (  -0.03,-137.21) (   0.22,-136.19)  117.40                80
 10/08/2021   10:50:27   (   0.03,-137.21) (   1.00,-141.45)  483.87                80
 10/09/2021   10:34:23   (   0.03,-137.20) (  -0.01,-136.91)   31.89                80
 10/11/2021   22:34:56   (  -0.03,-137.17) (  -0.12,-137.69)   59.30                80
 10/12/2021   22:18:51   (  -0.03,-137.16) (   0.89,-133.16)  455.64                80
 10/14/2021   10:38:00   (   0.02,-137.13) (   0.28,-138.43)  147.56                80
 10/15/2021   10:21:55   (   0.02,-137.12) (  -0.73,-133.90)  367.18                80
 10/16/2021   22:41:12   (  -0.01,-137.09) (  -0.46,-139.20)  239.87                80