Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/28/2021   10:37:56   (   0.04,-137.21) (   0.31,-138.44)  140.01                80
 09/29/2021   10:21:51   (   0.04,-137.20) (  -0.70,-133.90)  375.71                80
 09/30/2021   22:41:09   (  -0.03,-137.19) (  -0.46,-139.21)  230.04                80
 10/01/2021   22:25:04   (  -0.03,-137.18) (   0.55,-134.68)  285.38                80
 10/03/2021   10:44:12   (   0.02,-137.16) (   0.62,-139.95)  317.10                80
 10/04/2021   10:28:08   (   0.02,-137.15) (  -0.39,-135.42)  198.05                80
 10/05/2021   22:47:24   (  -0.02,-137.13) (  -0.81,-140.72)  408.56                80
 10/06/2021   22:31:20   (  -0.02,-137.12) (   0.20,-136.19)  106.33                80
 10/08/2021   10:50:28   (   0.02,-137.09) (   0.97,-141.46)  497.03                80
 10/09/2021   10:34:24   (   0.02,-137.07) (  -0.04,-136.92)   17.49                80