Year
| Case Name | Opening Date | Last Update | Status | Description |
|---|---|---|---|---|
| HC_MCD_24254 | 2024-09-10 | 2024-09-12 | Note | MCD12Q1 Land Cover Product issue <h1>MCD12Q1 Land Cover Product issue</h1>The C61 Terra and Aqua combined MODIS Land Cover Type (MCD12Q1) data product provides global land cover types at yearly intervals from 2001-2023. The land cover data product is derived using supervised classification of MODIS Terra and Aqua reflectance data. The classification algorithm uses labeled training samples selected globally to represent land cover categories derived under the IGBP, UMD, LAI, BIOME-BGC, and PFT classification schemes. These training samples were selected to represent land classes, best suited over a certain period. However, due to lack of funding, the science team was not able to keep the training database updated over the course of the years, and some of these training sites could well have undergone changes in their land cover characteristics, especially after 2021. Hence users are urged to maintain caution while using the C61/MCD12Q1 land cover layers for 2021 and beyond. LDOPE evaluation of land cover change percentages, from one year to another year for latitudinal zones and select tiles shows that some land cover classes have undergone significant changes, e.g., grassland, shrublands, and forest types.<br><br><br> |
| HC_MCD19_24226 | 2024-08-13 | 2024-08-13 | Note | C61 MODIS MAIAC data (MCD19) reprocessing The C61/ MODIS MAIAC data (MCD19*) will be reprocessed for the dates 2022/001 - 2022/183. One of the C61/MODIS MAIAC reprocessing stream was started in the beginning on 2022/001 and had not initialized with the correct set of stable daily coefficient files. Hence, the science team has recommended reprocessing the C61/MODIS MAIAC products using the stable daily coefficient files, from 2022/001 - 2022/183.<br><br><br> |
| TM_MCD19_23137 | 2023-05-17 | 2023-05-18 | Note | MCD19A3CMG Polar Artifact An artifact was discovered in the C61/MCD19A3CMG EVI, NDVI, and the gap filled NDVI layers over the entire swath of southern polar region. On further review, the same artifact was observed in the tiled MCD19A3D snow fraction, 1km NDVI, and Nadir BRDF-Adjusted Reflectance (Band1, Band2) as well. The image below shows the artifact in the MCD19A3CMG for 2008/295. The second image shows the artifact for the same day in the MCD19A3D NBAR_250m and NDVI1km layers. The artifacts occurred over permanently snow covered areas and no meaningful NDVI retrieval is expected over these regions. This is an artifact from a software bug in the science processing code that will be fixed in the forward processing. Product from the prior mission period will not be reprocessed and users are being advised to use the data with caution.<br><br> Affected Dates: <br> <ul><li>2000/055 - 2000/138<li>2000/209 - 2001/137<li>2002/209 - 2003/137 continued until 2018/209 - 2019/044<li>2022/001 - 2022/079<li>2022/241 - 2023/103<br><br><br> |
| PM_MCD19_22210 | 2022-07-29 | 2022-08-29 | Closed | Aqua data outages impact MCD19 C61 production <br><br><br><b><center>************************************************ <p style="color:red">UPDATE 08.26.22</p> ************************************************</b></center><br><br> This production issue has been resolved. The image below shows the newly reprocessed MCD19A1, day A2003132 (2003-05-12), where the both the Aqua and Terra inputs have been included as input. As reprocessing proceeds, LDOPE will review and verify science quality for all impacted dates listed below. |
| AS_MCD64_21286 | 2021-10-13 | 2021-11-08 | Closed | C61 burned area product (MCD64A1) production halt MODAPS has halted the production of the C61 Burned Area product (MCD64A1) as it was discovered that the C61 processing was using the wrong version of that code that did NOT have the fix for the edge of the tile bug that was earlier fixed in C6 products. This specific edge of the tile bug causes all burned grid cells in the left-most and right-most columns of certain tiles to be reclassified as unburned in 30 specific tiles.<br><br>This note will be further updated once the fix is applied to C61 and all affected MCD64A1 is re-processed.<br><br><br><br><b><center>******************** <p style="color:red">C61 Burned Area Product Production Halt: UPDATE 11.08.21</p> ********************</b></center><br><br>All the existing C61 burned area product (MCD64A1) has been fully re-processed with the corrected code, and the same is currently in operation for the ongoing re-processing, as of 2021.308 (11/04/2021). The re-processed version of this product should be available from LP-DAAC.<br><br> |
| PM_MCD64_21133 | 2021-05-13 | 2021-05-13 | Note | MODIS fire products not available prior to November 2000 Although the Terra MODIS instrument first began acquiring data in February 2000, crosstalk and calibration remained problematic until early November 2000 (see Section 7.2.1 and 8.3.10 of the MODIS Active Fire, <A href="https://landweb.modaps.eosdis.nasa.gov/data/userguide/MOD14_C61_UserGuide.pdf"> MOD14 User's Guide.)</A>. Among other problems, this compromises the integrity and consistency of the earliest MODIS fire (MxD14) and the Burned Area (BA) products (MCD64), in particular, the CMG fire products, which are almost always used for time series analyses. For more details on the BA specific deficit observed in C61, for November 2000 and prior dates, please refer to <A href="https://landweb.modaps.eosdis.nasa.gov/data/userguide/MCD64A1_C6-C61_Figs_202105.pdf"> this documentation </A>provided by the science team.<br><br> |
