Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2021   09:52:27   (  -0.20,-127.78) (  -0.27,-127.33)   50.39                80
 02/15/2021   21:55:39   (   0.20,-127.92) (   0.12,-128.11)   23.17                80
 02/16/2021   21:39:34   (   0.19,-127.95) (   1.15,-123.58)  497.33                80
 02/18/2021   10:01:23   (  -0.19,-127.96) (  -0.00,-128.86)  102.43                80
 02/19/2021   09:39:58   (  -0.19,-127.99) (  -1.03,-124.33)  417.09                80
 02/20/2021   22:01:54   (   0.18,-128.07) (  -0.14,-129.64)  177.95                80
 02/21/2021   21:45:49   (   0.18,-128.10) (   0.83,-125.10)  341.64                80
 02/23/2021   10:07:37   (  -0.17,-128.10) (   0.31,-130.37)  258.61                80
 02/24/2021   09:46:12   (  -0.17,-128.12) (  -0.66,-125.83)  260.10                80
 02/25/2021   22:08:08   (   0.16,-128.19) (  -0.50,-131.14)  336.73                80
 02/26/2021   21:52:04   (   0.16,-128.21) (   0.53,-126.61)  182.16                80