Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 6 4.  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)
 06/04/2021   22:24:59   ( -70.88,  21.25) 06/04/2021   22:23:51  ( -70.91,  19.01)   81.65                68
 06/04/2021   23:14:39   (  70.07,-172.30) 06/04/2021   23:14:21  (  70.07,-172.33)    1.14                18
 06/05/2021   00:04:09   ( -69.95,  -4.83) 06/05/2021   00:05:03  ( -69.97,  -4.87)    2.74                54
 06/07/2021   14:41:43   ( -70.13, 136.01) 06/07/2021   14:40:33  ( -70.13, 136.04)    1.01                70
 06/07/2021   15:31:10   (  70.02, -56.49) 06/07/2021   15:31:17  (  70.02, -56.49)    0.64                 7
 06/07/2021   16:20:43   ( -69.75, 110.76) 06/07/2021   16:21:55  ( -69.71, 111.29)   21.02                72
 06/10/2021   06:58:13   ( -70.08,-108.17) 06/10/2021   06:57:28  ( -70.07,-108.12)    2.25                45
 06/10/2021   07:47:40   (  69.98,  59.32) 06/10/2021   07:48:12  (  69.97,  59.35)    1.42                32
 06/12/2021   22:25:03   (  70.74,-158.95) 06/12/2021   22:23:54  (  70.76,-160.75)   66.00                69
 06/12/2021   23:14:43   ( -70.09,   7.71) 06/12/2021   23:14:25  ( -70.08,   7.65)    2.70                18
 06/13/2021   00:04:11   (  69.92, 175.13) 06/13/2021   00:05:08  (  69.92, 175.19)    2.48                57
 06/15/2021   14:41:44   (  70.14, -43.97) 06/15/2021   14:40:39  (  70.13, -43.99)    0.96                65
 06/15/2021   15:31:14   ( -70.03, 123.52) 06/15/2021   15:31:21  ( -70.03, 123.49)    1.23                 7
 06/15/2021   16:20:48   (  69.54, -69.52) 06/15/2021   16:21:58  (  69.55, -68.50)   39.86                70