Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 23.  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)
 05/25/2021   06:58:06   ( -70.09,-108.16) 05/25/2021   06:57:18  ( -70.11,-108.13)    2.70                48
 05/25/2021   07:47:33   (  69.98,  59.34) 05/25/2021   07:48:02  (  69.99,  59.35)    1.26                29
 05/27/2021   22:24:54   (  70.88,-158.74) 05/27/2021   22:23:47  (  70.93,-161.01)   82.78                67
 05/27/2021   23:14:37   ( -70.06,   7.68) 05/27/2021   23:14:14  ( -70.04,   7.73)    2.82                23
 05/28/2021   00:04:04   (  69.96, 175.18) 05/28/2021   00:04:58  (  69.93, 175.20)    2.72                54
 05/30/2021   14:41:38   (  70.14, -43.96) 05/30/2021   14:40:29  (  70.14, -43.97)    0.19                69
 05/30/2021   15:31:08   ( -70.03, 123.52) 05/30/2021   15:31:11  ( -70.03, 123.51)    0.36                 3
 05/30/2021   16:20:39   (  69.70, -69.29) 05/30/2021   16:21:50  (  69.66, -68.63)   26.12                71
 06/02/2021   06:58:08   (  70.10,  71.87) 06/02/2021   06:57:24  (  70.08,  71.89)    2.59                44
 06/02/2021   07:47:38   ( -70.00,-120.65) 06/02/2021   07:48:06  ( -69.97,-120.63)    2.85                28
 06/04/2021   22:24:59   ( -70.88,  21.26) 06/04/2021   22:23:51  ( -70.91,  19.02)   81.71                68
 06/04/2021   23:14:39   (  70.06,-172.31) 06/04/2021   23:14:21  (  70.08,-172.35)    2.22                18
 06/05/2021   00:04:09   ( -69.96,  -4.82) 06/05/2021   00:05:03  ( -69.97,  -4.86)    1.77                54