Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/08/2021   09:56:00   (  -0.18,-128.10) (  -0.35,-127.46)   74.05                80
 08/10/2021   21:56:32   (   0.19,-128.05) (   0.15,-128.23)   20.08                80
 08/11/2021   21:40:28   (   0.18,-128.07) (   1.14,-123.69)  498.19                80
 08/13/2021   09:59:37   (  -0.20,-128.19) (  -0.01,-128.97)   90.10                80
 08/14/2021   09:43:34   (  -0.19,-128.20) (  -1.05,-124.45)  427.93                80
 08/15/2021   22:02:51   (   0.22,-128.12) (  -0.13,-129.76)  185.68                80
 08/16/2021   21:46:47   (   0.21,-128.13) (   0.86,-125.22)  331.59                80
 08/18/2021   10:05:56   (  -0.23,-128.23) (   0.27,-130.50)  258.55                80
 08/19/2021   09:49:51   (  -0.23,-128.24) (  -0.72,-125.97)  258.53                80
 08/20/2021   22:09:09   (   0.25,-128.16) (  -0.46,-131.28)  355.65                80
 08/21/2021   21:53:05   (   0.24,-128.16) (   0.59,-126.75)  161.25                80