Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 19.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/22/2021   00:24:17   ( -68.72,  -7.94) 07/22/2021   00:25:13  ( -68.72,  -7.96)    1.01                56
 07/22/2021   01:15:01   (  68.59, 159.54) 07/22/2021   01:14:40  (  68.61, 159.55)    3.01                21
 07/22/2021   02:05:30   ( -67.81, -32.15) 07/22/2021   02:04:21  ( -67.89, -33.68)   64.85                69
 07/24/2021   15:50:49   (  69.70, -60.87) 07/24/2021   15:51:55  (  69.59, -58.59)   88.94                66
 07/24/2021   16:41:14   ( -68.71, 107.83) 07/24/2021   16:41:39  ( -68.70, 107.90)    2.61                25
 07/24/2021   17:31:57   (  68.53, -84.61) 07/24/2021   17:31:07  (  68.53, -84.67)    2.35                50
 07/27/2021   08:07:29   (  68.79,  56.18) 07/27/2021   08:08:35  (  68.78,  56.25)    2.70                66
 07/27/2021   08:58:10   ( -68.65,-136.32) 07/27/2021   08:58:06  ( -68.62,-136.32)    2.73                 4
 07/27/2021   09:48:49   (  68.25,  31.51) 07/27/2021   09:47:37  (  68.28,  30.91)   24.76                72
 07/30/2021   00:24:25   (  68.73, 172.02) 07/30/2021   00:25:02  (  68.70, 172.02)    3.33                37
 07/30/2021   01:15:06   ( -68.59, -20.47) 07/30/2021   01:14:32  ( -68.60, -20.47)    0.89                34
 08/01/2021   15:50:44   ( -69.22, 119.81) 08/01/2021   15:51:54  ( -69.12, 120.79)   40.51                70
 08/01/2021   16:41:20   (  68.67, -72.13) 08/01/2021   16:41:27  (  68.66, -72.14)    0.78                 7
 08/01/2021   17:32:01   ( -68.53,  95.37) 08/01/2021   17:30:58  ( -68.51,  95.31)    3.43                63