Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 15.  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)
 05/17/2021   06:58:00   (  70.08,  71.84) 05/17/2021   06:57:13  (  70.10,  71.90)    3.13                47
 05/17/2021   07:47:29   ( -70.02,-120.61) 05/17/2021   07:47:55  ( -70.00,-120.64)    2.78                26
 05/19/2021   22:24:49   ( -70.99,  21.43) 05/19/2021   22:23:42  ( -71.03,  18.85)   93.37                67
 05/19/2021   23:14:31   (  70.07,-172.30) 05/19/2021   23:14:10  (  70.08,-172.31)    1.87                21
 05/20/2021   00:04:01   ( -69.96,  -4.82) 05/20/2021   00:04:52  ( -69.98,  -4.85)    2.86                51
 05/22/2021   14:41:35   ( -70.16, 136.06) 05/22/2021   14:40:23  ( -70.18, 136.00)    3.23                72
 05/22/2021   15:31:02   (  70.05, -56.45) 05/22/2021   15:31:06  (  70.02, -56.45)    3.41                 4
 05/22/2021   16:20:34   ( -69.84, 110.89) 05/22/2021   16:21:46  ( -69.81, 111.18)   11.57                72
 05/25/2021   06:58:06   ( -70.08,-108.17) 05/25/2021   06:57:18  ( -70.11,-108.14)    3.28                48
 05/25/2021   07:47:32   (  70.03,  59.40) 05/25/2021   07:48:02  (  70.01,  59.33)    3.36                30
 05/27/2021   22:24:54   (  70.87,-158.75) 05/27/2021   22:23:46  (  70.90,-160.95)   79.96                68
 05/27/2021   23:14:37   ( -70.06,   7.68) 05/27/2021   23:14:14  ( -70.05,   7.72)    1.85                23
 05/28/2021   00:04:04   (  69.95, 175.16) 05/28/2021   00:04:58  (  69.95, 175.18)    0.89                54