Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 6 18.  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)
 06/18/2021   06:58:15   (  70.06,  71.81) 06/18/2021   06:57:36  (  70.06,  71.88)    2.54                39
 06/18/2021   07:47:45   ( -69.95,-120.72) 06/18/2021   07:48:18  ( -69.97,-120.66)    3.49                33
 06/20/2021   22:25:09   ( -70.64,  20.90) 06/20/2021   22:23:59  ( -70.67,  19.37)   56.20                70
 06/20/2021   23:14:45   (  70.05,-172.32) 06/20/2021   23:14:33  (  70.03,-172.31)    1.94                12
 06/21/2021   00:04:15   ( -69.94,  -4.85) 06/21/2021   00:05:15  ( -69.94,  -4.85)    0.24                60
 06/23/2021   14:41:48   ( -70.14, 136.04) 06/23/2021   14:40:46  ( -70.12, 136.01)    2.27                62
 06/23/2021   15:31:15   (  69.98, -56.54) 06/23/2021   15:31:29  (  70.01, -56.51)    3.38                14
 06/23/2021   16:20:53   ( -69.43, 110.34) 06/23/2021   16:22:02  ( -69.44, 111.65)   51.49                69
 06/26/2021   06:58:18   ( -70.07,-108.18) 06/26/2021   06:57:42  ( -70.09,-108.19)    3.06                36
 06/26/2021   07:47:45   (  69.96,  59.31) 06/26/2021   07:48:26  (  69.99,  59.29)    2.96                41
 06/28/2021   22:25:14   (  70.37,-159.50) 06/28/2021   22:24:02  (  70.44,-160.27)   29.95                72
 06/28/2021   23:14:48   ( -70.05,   7.67) 06/28/2021   23:14:38  ( -70.02,   7.69)    3.18                10
 06/29/2021   00:04:15   (  69.94, 175.16) 06/29/2021   00:05:22  (  69.91, 175.16)    2.72                67
 07/01/2021   14:41:48   (  70.12, -43.97) 07/01/2021   14:40:53  (  70.10, -43.99)    2.41                55
 07/01/2021   15:31:18   ( -70.02, 123.52) 07/01/2021   15:31:35  ( -70.00, 123.49)    2.75                17
 07/01/2021   16:20:58   (  69.19, -69.97) 07/01/2021   16:22:05  (  69.15, -67.97)   79.38                67