Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 4 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2021   10:00:58   (   0.03,-127.74) (   0.22,-128.72)  110.22                80
 04/24/2021   09:39:33   (   0.02,-127.70) (  -0.78,-124.18)  401.80                80
 04/25/2021   22:01:28   (  -0.03,-127.63) (  -0.44,-129.47)  209.67                80
 04/26/2021   21:45:23   (  -0.02,-127.59) (   0.56,-124.93)  302.74                80
 04/28/2021   10:07:09   (   0.03,-127.55) (   0.64,-130.19)  302.29                80
 04/29/2021   09:45:44   (   0.02,-127.50) (  -0.41,-125.67)  208.89                80
 04/30/2021   22:07:40   (  -0.03,-127.40) (  -0.80,-130.96)  405.27                80
 05/01/2021   21:51:34   (  -0.02,-127.36) (   0.20,-126.43)  106.39                80
 05/03/2021   10:13:20   (   0.03,-127.31) (   1.00,-131.68)  498.27                80
 05/04/2021   09:51:55   (   0.03,-127.26) (   0.00,-127.15)   12.60                80