Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 6 22.  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)
 06/23/2021   14:41:48   ( -70.10, 135.98) 06/23/2021   14:40:45  ( -70.10, 136.03)    2.05                63
 06/23/2021   15:31:15   (  70.00, -56.51) 06/23/2021   15:31:29  (  69.99, -56.48)    1.89                14
 06/23/2021   16:20:53   ( -69.45, 110.36) 06/23/2021   16:22:03  ( -69.47, 111.60)   48.54                70
 06/26/2021   06:58:18   ( -70.08,-108.16) 06/26/2021   06:57:42  ( -70.08,-108.16)    0.63                36
 06/26/2021   07:47:45   (  69.98,  59.34) 06/26/2021   07:48:26  (  69.96,  59.32)    2.15                41
 06/28/2021   22:25:14   (  70.39,-159.46) 06/28/2021   22:24:03  (  70.47,-160.32)   33.15                71
 06/28/2021   23:14:48   ( -70.06,   7.70) 06/28/2021   23:14:39  ( -70.05,   7.64)    2.41                 9
 06/29/2021   00:04:15   (  69.96, 175.19) 06/29/2021   00:05:23  (  69.94, 175.12)    3.37                68
 07/01/2021   14:41:48   (  70.09, -44.02) 07/01/2021   14:40:52  (  70.08, -43.95)    2.86                56
 07/01/2021   15:31:18   ( -69.99, 123.47) 07/01/2021   15:31:34  ( -69.98, 123.52)    2.06                16
 07/01/2021   16:20:58   (  69.16, -70.01) 07/01/2021   16:22:05  (  69.18, -68.01)   79.22                67
 07/04/2021   06:58:18   (  70.06,  71.82) 07/04/2021   06:57:49  (  70.06,  71.84)    0.71                29
 07/04/2021   07:47:48   ( -69.96,-120.69) 07/04/2021   07:48:31  ( -69.96,-120.69)    0.09                43