Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2021   10:06:23   (  -0.04,-127.96) (   0.51,-130.46)  284.41                80
 12/25/2021   09:50:16   (  -0.03,-127.99) (  -0.47,-125.91)  235.69                80
 12/26/2021   22:09:32   (   0.05,-128.02) (  -0.67,-131.22)  365.05                80
 12/27/2021   21:53:26   (   0.04,-128.05) (   0.36,-126.69)  154.90                80
 12/29/2021   10:12:31   (  -0.05,-128.09) (   0.83,-131.95)  440.25                80
 12/30/2021   09:56:26   (  -0.04,-128.11) (  -0.21,-127.42)   79.14                80
 01/01/2022   21:59:35   (   0.04,-128.15) (   0.06,-128.19)    4.99                80
 01/04/2022   09:59:55   (  -0.04,-128.20) (   0.10,-128.92)   81.86                80
 01/05/2022   09:43:48   (  -0.03,-128.21) (  -0.89,-124.38)  436.74                80