Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/19/2021   22:31:01   (  -0.05,-137.17) (   0.19,-136.17)  113.88                80
 08/21/2021   10:52:50   (   0.04,-137.16) (   1.00,-141.44)  487.69                80
 08/22/2021   10:31:25   (   0.04,-137.15) (   0.00,-136.91)   27.53                80
 08/24/2021   22:34:39   (  -0.03,-137.12) (  -0.14,-137.69)   64.47                80
 08/25/2021   22:18:35   (  -0.03,-137.11) (   0.85,-133.16)  450.70                80
 08/27/2021   10:40:23   (   0.03,-137.10) (   0.33,-138.43)  151.34                80
 08/28/2021   10:18:58   (   0.03,-137.09) (  -0.66,-133.89)  363.35                80
 08/29/2021   22:40:56   (  -0.03,-137.05) (  -0.52,-139.20)  244.95                80
 08/30/2021   22:24:52   (  -0.03,-137.03) (   0.53,-134.68)  269.28                80
 09/01/2021   10:44:00   (   0.02,-137.01) (   0.65,-139.95)  334.32                80