Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 17.  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)
 04/17/2021   23:14:33   (  70.09,-172.37) 04/17/2021   23:14:00  (  70.10,-172.30)    2.70                33
 04/18/2021   00:04:02   ( -70.03,  -4.82) 04/18/2021   00:04:42  ( -70.02,  -4.86)    2.43                40
 04/20/2021   14:41:27   ( -70.51, 136.47) 04/20/2021   14:40:16  ( -70.59, 135.39)   41.10                71
 04/20/2021   15:31:00   (  70.08, -56.51) 04/20/2021   15:30:53  (  70.10, -56.54)    3.08                 7
 04/20/2021   16:20:30   ( -69.97, 110.97) 04/20/2021   16:21:34  ( -69.97, 110.99)    0.78                64
 04/23/2021   06:58:01   ( -70.17,-108.15) 04/23/2021   06:57:02  ( -70.18,-108.18)    1.46                59
 04/23/2021   07:47:28   (  70.06,  59.34) 04/23/2021   07:47:46  (  70.06,  59.31)    1.31                18
 04/23/2021   08:37:08   ( -69.40,-133.92) 04/23/2021   08:38:17  ( -69.39,-132.39)   60.10                69
 04/25/2021   23:14:29   ( -70.15,   7.70) 04/25/2021   23:13:55  ( -70.13,   7.66)    2.63                34
 04/26/2021   00:03:56   (  70.04, 175.19) 04/26/2021   00:04:39  (  70.02, 175.14)    2.49                43
 04/28/2021   14:41:23   (  70.45, -43.62) 04/28/2021   14:40:12  (  70.50, -44.46)   31.67                71
 04/28/2021   15:30:58   ( -70.07, 123.47) 04/28/2021   15:30:48  ( -70.09, 123.51)    2.30                10
 04/28/2021   16:20:25   (  69.96, -69.05) 04/28/2021   16:21:32  (  69.98, -69.02)    3.16                67