Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 15.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2021   14:41:49   (  70.11, -43.97) 07/17/2021   14:41:05  (  70.08, -44.00)    3.06                44
 07/17/2021   15:31:19   ( -70.00, 123.51) 07/17/2021   15:31:47  ( -70.00, 123.45)    2.24                28
 07/20/2021   06:08:38   ( -70.87, -94.60) 07/20/2021   06:07:30  ( -70.88, -96.81)   80.38                68
 07/20/2021   06:58:18   (  70.05,  71.84) 07/20/2021   06:58:00  (  70.02,  71.86)    3.22                18
 07/20/2021   07:47:48   ( -69.94,-120.68) 07/20/2021   07:48:42  ( -69.94,-120.69)    0.63                54
 07/22/2021   22:25:20   ( -70.15,  20.22) 07/22/2021   22:24:13  ( -70.14,  20.15)    3.42                67
 07/22/2021   23:14:48   (  69.99,-172.37) 07/22/2021   23:14:57  (  70.02,-172.36)    3.22                 9
 07/23/2021   00:04:22   ( -69.67,  -5.18) 07/23/2021   00:05:34  ( -69.67,  -4.52)   25.80                72
 07/25/2021   14:41:50   ( -70.09, 136.02) 07/25/2021   14:41:09  ( -70.08, 136.01)    1.76                41
 07/25/2021   15:31:17   (  69.98, -56.50) 07/25/2021   15:31:53  (  69.96, -56.51)    2.02                36
 07/28/2021   06:08:42   (  70.56,  84.96) 07/28/2021   06:07:32  (  70.58,  83.66)   48.10                70
 07/28/2021   06:58:20   ( -70.03,-108.19) 07/28/2021   06:58:05  ( -70.02,-108.14)    2.28                15
 07/28/2021   07:47:47   (  69.91,  59.29) 07/28/2021   07:48:49  (  69.90,  59.35)    2.36                62