Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/27/2021   10:07:28   (  -0.06,-128.36) (   0.36,-130.33)  223.64                80
 03/28/2021   09:46:03   (  -0.07,-128.35) (  -0.62,-125.79)  291.48                80
 03/29/2021   22:07:59   (   0.06,-128.35) (  -0.54,-131.10)  312.20                80
 03/30/2021   21:51:54   (   0.07,-128.35) (   0.45,-126.56)  203.30                80
 04/01/2021   10:13:41   (  -0.05,-128.32) (   0.72,-131.83)  399.85                80
 04/02/2021   09:52:16   (  -0.06,-128.30) (  -0.27,-127.29)  114.45                80
 04/03/2021   22:14:12   (   0.04,-128.27) (  -0.89,-132.60)  491.69                80
 04/04/2021   21:58:06   (   0.05,-128.26) (   0.09,-128.06)   23.09                80
 04/07/2021   10:01:08   (  -0.04,-128.21) (   0.09,-128.79)   65.58                80
 04/08/2021   09:39:43   (  -0.05,-128.19) (  -0.90,-124.25)  448.40                80
 04/09/2021   22:01:39   (   0.03,-128.16) (  -0.25,-129.56)  158.54                80