Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 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)
 01/20/2021   10:45:38   (  -0.00,-137.21) (   0.58,-139.82)  297.63                80
 01/21/2021   10:24:13   (  -0.01,-137.21) (  -0.44,-135.29)  218.38                80
 01/22/2021   22:46:09   (   0.01,-137.20) (  -0.75,-140.60)  387.07                80
 01/23/2021   22:30:05   (   0.01,-137.19) (   0.27,-136.07)  128.54                80
 01/25/2021   10:51:52   (  -0.01,-137.18) (   0.94,-141.33)  473.58                80
 01/26/2021   10:30:28   (  -0.02,-137.17) (  -0.08,-136.80)   41.44                80
 01/28/2021   22:33:40   (   0.02,-137.13) (  -0.08,-137.58)   50.96                80
 01/29/2021   22:17:35   (   0.02,-137.11) (   0.95,-133.05)  463.66                80
 01/31/2021   10:39:22   (  -0.02,-137.09) (   0.26,-138.31)  139.75                80
 02/01/2021   10:17:58   (  -0.02,-137.07) (  -0.76,-133.78)  374.51                80