Search found 11 matches

by jonathanbahlmann
Wed Jul 15, 2026 2:32 am America/New_York
Forum: Home
Question: Impact of Ionospheric Correction via TEC files
Replies: 4

Re: Impact of Ionospheric Correction via TEC files

Hi Bill,

yes, that helps. Thank you very much for following this.
by jonathanbahlmann
Thu Jul 09, 2026 3:14 am America/New_York
Forum: Home
Question: Impact of Ionospheric Correction via TEC files
Replies: 4

Re: Impact of Ionospheric Correction via TEC files

Hi Bill, thank you for coming back to this! My question has not been answered yet. In the thread "Data Latency" Max explained very well the overall procedure, but my questions about TEC remain: Is the TEC correction important for geometric errors, radiometric errors or both? What kind of e...
by jonathanbahlmann
Tue Jun 30, 2026 10:58 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

Please disregard my above post, it is exactly the same as before. I was struggling with the pagination..

Thank you very much Max for all your explanations. I am looking forward to trying all that out soon.
by jonathanbahlmann
Tue Jun 30, 2026 7:36 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

Alright, now I'm getting that the uncertainty you mentioned refers to the "frame/runconfig to RRSD dataset" matching - not to the pixel geolocation accuracy of the L1 or L2 products processed from the RRSD data. The geolocation accuracy of the processed products depends on the precision of...
by jonathanbahlmann
Mon Jun 29, 2026 4:37 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

Alright, now I'm getting that the uncertainty you mentioned refers to the "frame/runconfig to RRSD dataset" matching - not to the pixel geolocation accuracy of the L1 or L2 products processed from the RRSD data. The geolocation accuracy of the processed products depends on the precision of...
by jonathanbahlmann
Tue Jun 23, 2026 3:09 am America/New_York
Forum: Home
Question: Impact of Ionospheric Correction via TEC files
Replies: 4

Impact of Ionospheric Correction via TEC files

I am trying to gather information about procedure of and possible problems with near-real time processing the NISAR L0 RRSD data up to Level2 GSLC independently of the official processing (https://forum.earthdata.nasa.gov/viewtopic.php?t=7970). In the thread it came up that for the RSLC -> GSLC proc...
by jonathanbahlmann
Thu Jun 18, 2026 8:43 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

re: watermask: understood. Thank you for outlining the procedure to link image times and frame numbers so extensively. So in a runconfig, the start and end times are the start and end times of the matching _frame_ that I want to process for, not the start and end times found in the data/RRSD - even ...
by jonathanbahlmann
Wed Jun 17, 2026 7:22 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

Are the watermask files available via earthdata as well (like the DEM)? I can find it in earthdata but I can't find links parallel to the DEM links in the above mentioned documentation (e.g. https://nisar.asf.earthdatacloud.nasa.gov/NISAR/DEM/v1.2/EPSG4326/EPSG4326.vrt). I'm asking because S3 access...
by jonathanbahlmann
Mon Jun 15, 2026 8:11 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

Hi Max, thanks a lot for this comprehensive answer. I've asked around internally, and we do think it makes a lot of sense for us to process NISAR data this way - depending on the observation scenario. We'll have a look at the incoming data from July forward to do the final evaluation. Thanks also fo...
by jonathanbahlmann
Thu Jun 11, 2026 3:59 am America/New_York
Forum: Home
Question: NISAR Data Latency
Replies: 13

Re: NISAR Data Latency

Thank you for your swift reply. The research mission focus, possible outages, and that routine sea ice monitoring is not an emergency scenario are of course all perfectly understandable. This renders the 1-12 hours for L0 RRSD delivery all the more interesting, as that is a good basis to deliver dat...