Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2020   10:13:45   (   0.14,-128.25) (   0.95,-131.78)  402.17                80
 12/27/2020   09:52:21   (   0.12,-128.25) (  -0.12,-127.26)  113.52                80
 12/28/2020   22:16:57   (  -0.17,-128.27) (  -1.15,-132.55)  487.98                80
 12/29/2020   21:55:33   (  -0.15,-128.27) (  -0.08,-128.03)   27.06                80
 01/01/2021   10:01:16   (   0.17,-128.22) (   0.28,-128.77)   61.94                80
 01/02/2021   09:39:52   (   0.15,-128.21) (  -0.73,-124.24)  452.74                80
 01/03/2021   22:04:28   (  -0.19,-128.22) (  -0.48,-129.54)  149.85                80
 01/04/2021   21:43:04   (  -0.16,-128.21) (   0.53,-125.01)  364.47                80
 01/06/2021   10:07:31   (   0.21,-128.16) (   0.68,-130.27)  240.45                80
 01/07/2021   09:46:06   (   0.18,-128.15) (  -0.33,-125.74)  273.76                80