Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 20.  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)
 05/22/2021   14:41:34   ( -70.16, 136.07) 05/22/2021   14:40:22  ( -70.17, 136.01)    2.28                72
 05/22/2021   15:31:01   (  70.06, -56.43) 05/22/2021   15:31:06  (  70.06, -56.51)    3.06                 5
 05/22/2021   16:20:33   ( -69.84, 110.89) 05/22/2021   16:21:46  ( -69.85, 111.11)    8.54                73
 05/25/2021   06:58:06   ( -70.09,-108.16) 05/25/2021   06:57:18  ( -70.10,-108.12)    1.91                48
 05/25/2021   07:47:33   (  69.98,  59.34) 05/25/2021   07:48:02  (  69.99,  59.35)    1.10                29
 05/27/2021   22:24:54   (  70.88,-158.73) 05/27/2021   22:23:47  (  70.93,-161.01)   82.80                67
 05/27/2021   23:14:37   ( -70.07,   7.69) 05/27/2021   23:14:15  ( -70.09,   7.66)    3.17                22
 05/28/2021   00:04:04   (  69.96, 175.18) 05/28/2021   00:04:58  (  69.93, 175.21)    2.79                54
 05/30/2021   14:41:38   (  70.14, -43.96) 05/30/2021   14:40:29  (  70.14, -43.97)    0.25                69
 05/30/2021   15:31:08   ( -70.04, 123.52) 05/30/2021   15:31:11  ( -70.03, 123.51)    0.70                 3
 05/30/2021   16:20:39   (  69.71, -69.29) 05/30/2021   16:21:50  (  69.67, -68.63)   25.97                71
 06/02/2021   06:58:08   (  70.10,  71.87) 06/02/2021   06:57:24  (  70.09,  71.88)    2.24                44
 06/02/2021   07:47:38   ( -70.00,-120.64) 06/02/2021   07:48:06  ( -69.98,-120.64)    3.18                28