Search found 17 matches

by mitchbon
Wed May 28, 2025 9:08 am America/New_York
Forum: Home
Question: Harmonized Landsat Sentinel-2 (HLS) Version 2.0
Replies: 2

Re: Release of Harmonized Landsat Sentinel-2 (HLS) Version 2.0

I am a bit confused, hasn't HLS 2.0 been available for some time now and is already fully back-processed?
by mitchbon
Thu Feb 20, 2025 9:35 am America/New_York
Forum: Home
Question: HLSS30_VI v002- Non availability of data prior to 2025
Replies: 2

Re: HLSS30_VI v002- Non availability of data prior to 2025

From the announcement (https://lpdaac.usgs.gov/news/lp-daac-release-of-harmonized-landsat-and-sentinel-2-vegetation-indices-hls-vi-data-products/): "Data are currently available for February 2025 through the present with forward processing continuing as new observations are collected. Historica...
by mitchbon
Mon Oct 21, 2024 9:23 am America/New_York
Forum: Home
Question: Certain HLS (S30) granule(s) lack imagery
Replies: 7

Re: Certain HLS (S30) granule(s) lack imagery

Thanks Danielle for the answer!
by mitchbon
Thu Sep 26, 2024 10:31 am America/New_York
Forum: Home
Question: Certain HLS (S30) granule(s) lack imagery
Replies: 7

Certain HLS (S30) granule(s) lack imagery

Hello, I am working with the HLS product and have noticed cases where certain granules, more so S30 than L30, lack imagery compared to surrounding granules. Take this example from Hudson Bay Lowlands in Canada (around 54.50479,-83.08301): S30_granule_issue.jpg This shows a 180 x 180 km squared area,...
by mitchbon
Wed Jun 05, 2024 9:14 am America/New_York
Forum: Home
Question: HLS 2.0 granules for almost any December day are missing
Replies: 8

Re: HLS 2.0 granules for almost any December day are missing

Is this a higher latitude area? Landsat and Sentinel-2 image collection decreases significantly during the winter (esp. December/January) in higher latitude areas. For example, above ~50N you will find very few (if any) images during those months (at least in Canada). I assume this is due to lower s...
by mitchbon
Thu May 30, 2024 8:21 am America/New_York
Forum: Home
Question: Unexpected behaviour with HLS in LPCLOUD
Replies: 10

Re: Unexpected behaviour with HLS in LPCLOUD

The errors I get in search may be related to my network (I work on a restricted government network, which has made working with STAC data a bit cumbersome in some cases - requiring SSL workarounds etc.). For that tutorial, I manually searched through the STAC links for the HLS catalogs. At the time,...
by mitchbon
Tue May 28, 2024 1:12 pm America/New_York
Forum: Home
Question: Unexpected behaviour with HLS in LPCLOUD
Replies: 10

Re: Unexpected behaviour with HLS in LPCLOUD

I have generally kept my searches to smaller areas (I generally use a fishnet of tiles and do my processing one tile at a time - currently using 60 km tiles), but longer/more dense in time (e.g., all available time-steps). I have similarly run into issues when there are thousands of items. The main ...
by mitchbon
Tue May 28, 2024 8:33 am America/New_York
Forum: Home
Question: Unexpected behaviour with HLS in LPCLOUD
Replies: 10

Re: Unexpected behaviour with HLS in LPCLOUD

I have not seen this issue before, but I access the HLS collections using this method: itemsS30 = catalog.search(bbox = bboxLL, datetime = f'{start}/{end}', collections = ['HLSS30.v2.0'], limit = 100).item_collection() Where bboxLL is a set of lat/lon coordinates, start and end are date strings (e.g...
by mitchbon
Wed May 22, 2024 4:43 pm America/New_York
Forum: Home
Question: LPCLOUD STAC Down
Replies: 2

Re: LPCLOUD STAC Down

Correction to earlier posts, STAC link in question should be: https://cmr.earthdata.nasa.gov/stac/LPCLOUD

In any case, it is working again.
by mitchbon
Wed May 22, 2024 11:42 am America/New_York
Forum: Home
Question: LPCLOUD STAC Down
Replies: 2

Re: LPCLOUD STAC Down

Dug a little deeper and I think it is related to maintenance. If you go to https://cmr.earthdata.nasa.gov/search you will see this alert: Outage: We have a scheduled deployment for CMR 1.248.0 to PROD Wednesday, May 22nd 2024. As part of this deployment, we will transition the load balancers in CMR ...