Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2021   10:05:21   (  -0.01,-128.26) (   0.45,-130.38)  241.38                80
 07/02/2021   09:49:16   (   0.00,-128.24) (  -0.52,-125.84)  272.50                80
 07/03/2021   22:08:34   (   0.02,-128.12) (  -0.67,-131.15)  345.41                80
 07/04/2021   21:52:30   (   0.01,-128.10) (   0.36,-126.63)  168.41                80
 07/06/2021   10:11:39   (  -0.03,-128.14) (   0.80,-131.90)  428.21                80
 07/07/2021   09:55:35   (  -0.02,-128.11) (  -0.17,-127.36)   84.93                80
 07/09/2021   21:56:08   (   0.03,-127.95) (  -0.04,-128.13)   21.95                80
 07/10/2021   21:40:04   (   0.02,-127.92) (   1.00,-123.61)  491.19                80
 07/12/2021   09:59:14   (  -0.04,-127.95) (   0.17,-128.89)  106.50                80
 07/13/2021   09:43:09   (  -0.03,-127.91) (  -0.81,-124.35)  406.00                80