Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/04/2021   22:08:58   (   0.17,-127.93) (  -0.55,-131.23)  376.16                80
 08/05/2021   21:52:54   (   0.17,-127.95) (   0.43,-126.70)  142.50                80
 08/07/2021   10:12:03   (  -0.19,-128.08) (   0.70,-131.98)  444.94                80
 08/08/2021   09:56:00   (  -0.18,-128.10) (  -0.34,-127.46)   73.59                80
 08/10/2021   21:56:32   (   0.19,-128.04) (   0.14,-128.23)   21.00                80
 08/11/2021   21:40:29   (   0.18,-128.06) (   1.19,-123.70)  497.17                80
 08/13/2021   09:59:37   (  -0.20,-128.18) (   0.00,-128.97)   91.20                80
 08/14/2021   09:43:34   (  -0.19,-128.19) (  -1.04,-124.45)  426.73                80
 08/15/2021   22:02:51   (   0.22,-128.11) (  -0.14,-129.76)  187.19                80
 08/16/2021   21:46:47   (   0.21,-128.12) (   0.85,-125.22)  329.95                80