Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 12 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)
 12/29/2021   10:12:32   (  -0.05,-128.10) (   0.82,-131.95)  439.56                80
 12/30/2021   09:56:26   (  -0.04,-128.12) (  -0.22,-127.42)   80.19                80
 01/01/2022   21:56:54   (   0.04,-128.17) (   0.01,-128.18)    3.25                80
 01/04/2022   09:59:54   (  -0.04,-128.22) (   0.14,-128.91)   79.31                80
 01/05/2022   09:43:48   (  -0.03,-128.24) (  -0.90,-124.38)  439.62                80
 01/06/2022   22:03:03   (   0.05,-128.26) (  -0.29,-129.68)  161.85                80
 01/07/2022   21:46:57   (   0.04,-128.28) (   0.76,-125.15)  357.14                80
 01/09/2022   10:06:02   (  -0.05,-128.31) (   0.43,-130.41)  239.73                80
 01/10/2022   09:49:57   (  -0.04,-128.32) (  -0.61,-125.88)  279.12                80
 01/11/2022   22:09:11   (   0.05,-128.34) (  -0.57,-131.18)  322.70                80