Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/26/2021   21:56:43   (   0.26,-128.24) (   0.25,-128.27)    3.13                80
 08/29/2021   09:59:48   (  -0.27,-128.33) (  -0.13,-129.02)   78.40                80
 08/30/2021   09:43:43   (  -0.27,-128.33) (  -1.12,-124.48)  438.08                80
 08/31/2021   22:03:01   (   0.29,-128.25) (  -0.06,-129.79)  175.75                80
 09/01/2021   21:46:56   (   0.29,-128.24) (   0.93,-125.25)  340.10                80
 09/03/2021   10:06:05   (  -0.30,-128.31) (   0.19,-130.54)  253.60                80
 09/04/2021   09:50:01   (  -0.30,-128.30) (  -0.81,-126.00)  262.19                80
 09/05/2021   22:11:58   (   0.31,-128.22) (  -0.37,-131.31)  351.91                80
 09/06/2021   21:53:14   (   0.31,-128.21) (   0.63,-126.78)  163.45                80