Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 16.  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)
 03/16/2021   23:14:43   (  70.08,-172.34) 03/16/2021   23:14:12  (  70.07,-172.31)    1.86                31
 03/17/2021   00:04:13   ( -69.96,  -4.87) 03/17/2021   00:04:54  ( -69.99,  -4.87)    2.83                41
 03/19/2021   14:41:38   ( -70.41, 136.38) 03/19/2021   14:40:26  ( -70.43, 135.59)   29.35                72
 03/19/2021   15:31:10   (  70.04, -56.52) 03/19/2021   15:31:05  (  70.04, -56.50)    1.20                 5
 03/19/2021   16:20:40   ( -69.92, 110.96) 03/19/2021   16:21:46  ( -69.91, 111.02)    2.88                66
 03/22/2021   06:58:10   ( -70.15,-108.12) 03/22/2021   06:57:15  ( -70.14,-108.18)    2.49                55
 03/22/2021   07:47:37   (  70.04,  59.37) 03/22/2021   07:47:59  (  70.02,  59.31)    3.10                22
 03/22/2021   08:37:20   ( -69.22,-134.12) 03/22/2021   08:38:27  ( -69.20,-132.17)   76.84                67
 03/24/2021   23:14:38   ( -70.10,   7.69) 03/24/2021   23:14:08  ( -70.07,   7.70)    3.35                30
 03/25/2021   00:04:05   (  69.99, 175.17) 03/25/2021   00:04:53  (  70.00, 175.11)    2.95                48
 03/27/2021   14:41:35   (  70.20, -43.92) 03/27/2021   14:40:22  (  70.24, -44.11)    8.58                73
 03/27/2021   15:31:06   ( -70.04, 123.49) 03/27/2021   15:31:02  ( -70.05, 123.51)    1.02                 4
 03/27/2021   16:20:33   (  69.93, -69.03) 03/27/2021   16:21:46  (  69.93, -69.01)    1.08                73