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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/15/2021   21:55:39   (   0.20,-127.91) (   0.13,-128.11)   23.16                80
 02/16/2021   21:39:34   (   0.20,-127.95) (   1.16,-123.58)  497.17                80
 02/18/2021   10:01:23   (  -0.19,-127.96) (  -0.01,-128.86)  102.60                80
 02/19/2021   09:39:57   (  -0.19,-127.98) (  -0.98,-124.32)  416.89                80
 02/20/2021   22:01:54   (   0.18,-128.07) (  -0.19,-129.63)  178.30                80
 02/21/2021   21:45:49   (   0.18,-128.09) (   0.84,-125.10)  341.22                80
 02/23/2021   10:07:36   (  -0.17,-128.10) (   0.36,-130.36)  259.01                80
 02/24/2021   09:46:12   (  -0.17,-128.12) (  -0.67,-125.83)  259.64                80
 02/25/2021   22:08:08   (   0.16,-128.18) (  -0.49,-131.14)  337.34                80
 02/26/2021   21:52:04   (   0.16,-128.20) (   0.54,-126.62)  181.51                80
 02/28/2021   10:13:51   (  -0.16,-128.21) (   0.67,-131.88)  418.74                80