Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 9 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/30/2021   09:59:47   (   0.34,-127.55) (   0.66,-128.84)  148.36                80
 10/01/2021   09:43:42   (   0.34,-127.50) (  -0.35,-124.31)  363.63                80
 10/02/2021   22:02:59   (  -0.32,-127.42) (  -0.80,-129.62)  251.03                80
 10/03/2021   21:46:55   (  -0.33,-127.37) (   0.21,-125.09)  260.66                80
 10/05/2021   10:06:03   (   0.30,-127.32) (   0.96,-130.36)  345.86                80
 10/06/2021   09:49:58   (   0.31,-127.27) (   0.01,-125.81)  165.82                80
 10/07/2021   22:09:15   (  -0.29,-127.18) (  -1.16,-131.12)  449.24                80
 10/08/2021   21:53:10   (  -0.30,-127.13) (  -0.21,-126.58)   61.91                80
 10/11/2021   09:53:33   (   0.29,-127.01) (   0.37,-127.32)   35.61                80
 10/12/2021   09:37:29   (   0.30,-126.95) (  -0.65,-122.78)  474.89                80