Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/21/2021   21:45:49   (   0.18,-128.09) (   0.84,-125.10)  340.78                80
 02/23/2021   10:07:37   (  -0.17,-128.09) (   0.31,-130.37)  259.41                80
 02/24/2021   09:46:12   (  -0.17,-128.11) (  -0.66,-125.83)  259.17                80
 02/25/2021   22:08:08   (   0.16,-128.18) (  -0.50,-131.14)  338.00                80
 02/26/2021   21:52:04   (   0.17,-128.20) (   0.53,-126.61)  180.81                80
 02/28/2021   10:13:51   (  -0.16,-128.20) (   0.67,-131.88)  419.31                80
 03/01/2021   09:52:26   (  -0.16,-128.21) (  -0.36,-127.35)   98.65                80
 03/03/2021   21:58:17   (   0.16,-128.28) (   0.17,-128.12)   18.21                80
 03/06/2021   10:01:20   (  -0.15,-128.29) (  -0.00,-128.85)   65.04                80
 03/07/2021   09:39:56   (  -0.15,-128.29) (  -1.04,-124.33)  452.04                80