Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/12/2021   10:13:52   (  -0.20,-127.82) (   0.70,-131.87)  461.99                80
 02/13/2021   09:52:28   (  -0.20,-127.92) (  -0.33,-127.35)   65.98                80
 02/15/2021   21:58:21   (   0.20,-128.22) (   0.24,-128.14)   10.17                80
 02/18/2021   10:01:25   (  -0.19,-128.47) (  -0.12,-128.89)   47.09                80
 02/19/2021   09:40:00   (  -0.19,-128.57) (  -1.15,-124.36)  480.33                80
 02/20/2021   22:01:56   (   0.18,-128.74) (  -0.02,-129.66)  105.49                80
 02/21/2021   21:45:52   (   0.18,-128.84) (   1.01,-125.14)  421.88                80
 02/23/2021   10:07:40   (  -0.17,-128.98) (   0.14,-130.41)  163.58                80
 02/24/2021   09:46:16   (  -0.17,-129.07) (  -0.89,-125.89)  362.94                80
 02/25/2021   22:08:12   (   0.17,-129.22) (  -0.27,-131.19)  224.55                80