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   ( -70.17, 136.08) 05/22/2021   14:40:22  ( -70.16, 136.02)    2.58                72
 05/22/2021   15:31:02   (  70.02, -56.50) 05/22/2021   15:31:06  (  70.05, -56.50)    3.56                 4
 05/22/2021   16:20:33   ( -69.85, 110.90) 05/22/2021   16:21:46  ( -69.85, 111.12)    8.40                73
 05/25/2021   06:58:06   ( -70.10,-108.15) 05/25/2021   06:57:18  ( -70.10,-108.11)    1.22                48
 05/25/2021   07:47:33   (  69.99,  59.35) 05/25/2021   07:48:02  (  69.99,  59.36)    0.83                29
 05/27/2021   22:24:54   (  70.89,-158.72) 05/27/2021   22:23:47  (  70.93,-161.00)   82.91                67
 05/27/2021   23:14:37   ( -70.07,   7.70) 05/27/2021   23:14:15  ( -70.09,   7.66)    1.97                22
 05/28/2021   00:04:04   (  69.97, 175.19) 05/28/2021   00:04:59  (  69.98, 175.13)    2.79                55
 05/30/2021   14:41:37   (  70.15, -43.95) 05/30/2021   14:40:28  (  70.14, -43.96)    1.67                69
 05/30/2021   15:31:07   ( -70.05, 123.54) 05/30/2021   15:31:10  ( -70.03, 123.52)    2.05                 3
 05/30/2021   16:20:38   (  69.72, -69.28) 05/30/2021   16:21:50  (  69.72, -68.70)   22.18                72
 06/02/2021   06:58:08   (  70.12,  71.88) 06/02/2021   06:57:24  (  70.08,  71.88)    3.44                44
 06/02/2021   07:47:39   ( -69.96,-120.71) 06/02/2021   07:48:06  ( -69.98,-120.64)    3.24                27