Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 9.  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)
 05/09/2021   06:57:55   ( -70.13,-108.09) 05/09/2021   06:57:06  ( -70.13,-108.13)    1.71                49
 05/09/2021   07:47:22   (  70.03,  59.41) 05/09/2021   07:47:50  (  70.01,  59.36)    2.25                28
 05/11/2021   22:24:43   (  70.95,-158.62) 05/11/2021   22:23:36  (  70.99,-161.06)   88.72                67
 05/11/2021   23:14:27   ( -70.08,   7.71) 05/11/2021   23:14:02  ( -70.05,   7.75)    2.84                25
 05/12/2021   00:03:54   (  69.97, 175.21) 05/12/2021   00:04:47  (  69.99, 175.16)    3.03                53
 05/14/2021   14:41:29   (  70.12, -43.97) 05/14/2021   14:40:17  (  70.13, -43.91)    2.44                72
 05/14/2021   15:30:58   ( -70.02, 123.51) 05/14/2021   15:30:58  ( -70.03, 123.56)    2.05                 0
 05/14/2021   16:20:27   (  69.80, -69.15) 05/14/2021   16:21:39  (  69.76, -68.73)   16.89                72
 05/17/2021   06:57:59   (  70.11,  71.89) 05/17/2021   06:57:13  (  70.11,  71.88)    0.82                46
 05/17/2021   07:47:29   ( -70.01,-120.62) 05/17/2021   07:47:55  ( -70.01,-120.64)    1.12                26
 05/19/2021   22:24:49   ( -70.97,  21.41) 05/19/2021   22:23:42  ( -71.03,  18.85)   92.72                67
 05/19/2021   23:14:30   (  70.10,-172.25) 05/19/2021   23:14:10  (  70.09,-172.32)    2.91                20
 05/20/2021   00:04:01   ( -69.95,  -4.84) 05/20/2021   00:04:51  ( -69.93,  -4.77)    3.12                50
 05/22/2021   14:41:35   ( -70.14, 136.04) 05/22/2021   14:40:22  ( -70.12, 136.08)    2.85                73
 05/22/2021   15:31:02   (  70.02, -56.48) 05/22/2021   15:31:06  (  70.02, -56.45)    1.16                 4
 05/22/2021   16:20:34   ( -69.82, 110.86) 05/22/2021   16:21:46  ( -69.81, 111.18)   12.50                72