Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 1 12.  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)
 01/14/2021   14:41:50   ( -71.00, 137.29) 01/14/2021   14:40:44  ( -71.04, 134.61)   97.25                66
 01/14/2021   15:31:33   (  70.02, -56.51) 01/14/2021   15:31:11  (  70.04, -56.48)    2.34                22
 01/14/2021   16:21:02   ( -69.96, 111.04) 01/14/2021   16:21:53  ( -69.94, 110.98)    3.08                51
 01/17/2021   06:58:34   ( -70.11,-108.15) 01/17/2021   06:57:22  ( -70.12,-108.15)    2.02                72
 01/17/2021   07:48:01   (  70.00,  59.34) 01/17/2021   07:48:06  (  70.02,  59.32)    2.22                 5
 01/17/2021   08:37:33   ( -69.78,-133.33) 01/17/2021   08:38:45  ( -69.76,-132.97)   13.90                72
 01/19/2021   23:15:02   ( -70.08,   7.70) 01/19/2021   23:14:17  ( -70.10,   7.66)    2.70                45
 01/20/2021   00:04:29   (  69.97, 175.19) 01/20/2021   00:05:00  (  69.94, 175.20)    2.95                31
 01/22/2021   14:41:49   (  70.70, -43.14) 01/22/2021   14:40:40  (  70.76, -44.95)   66.78                69
 01/22/2021   15:31:29   ( -70.05, 123.54) 01/22/2021   15:31:10  ( -70.03, 123.54)    2.55                19
 01/22/2021   16:20:56   (  69.94, -68.97) 01/22/2021   16:21:54  (  69.93, -69.00)    1.63                58
 01/25/2021   06:58:27   (  70.12,  71.89) 01/25/2021   06:57:23  (  70.12,  71.85)    1.41                64
 01/25/2021   07:47:57   ( -70.01,-120.63) 01/25/2021   07:48:05  ( -70.01,-120.67)    1.57                 8
 01/25/2021   08:37:31   (  69.51,  46.33) 01/25/2021   08:38:41  (  69.49,  47.41)   42.33                70