Year
| Case Name | Opening Date | Last Update | Status | Description |
|---|---|---|---|---|
| TM_MYD_25022 | 2025-01-22 | 2025-01-22 | Note | AQUA L1B / L3 GEOLOCATION SHIFT <h1>AQUA L1B / L3 GEOLOCATION SHIFT</h1> Due to known greater relative shift in the Aqua Band to Band Registration (BBR) (Figure 1), compared to Terra, the spatial shift in some of the Aqua bands have been a known issue since the launch of MODIS Aqua. Some of these shifts, seen in the SWIR bands, have been addressed for land processing through a fix in the land specific swath to grid gridding process in C61. However, recently it has come to light that the similar shifts seen in some of the thermal emissive bands (TEB, mainly Bands 29-32), used for retrieval of LST, is causing shift in Aqua LST retrieval (MYD11 and MYD21), compared to MODIS Terra and VIIRS LST retrievals (Figure 2, 3). MODAPS is investigating this issue for a possible fix in MODIS Collection 7 processing. However, any fix implemented in C7 will primarily address the MYD21 LST, while similar shifts seen in MYD11 will unfortunately remain unaddressed for the rest of MODIS collections, due to some added complexities in addressing such issues in the MYD11 algorithm. <br><br>Further updates will be provided here as MODAPS explores ways to resolve this during the C7 processing. |
| TM_MYD_24364 | 2024-12-30 | 2024-12-30 | Note | AQUA Halted Processing <h1>AQUA Halted Processing</h1> On December 19th, 2024 (2024/354) MODIS AQUA data production was halted due to missing attitude and ephemeris data from FDS/GES-DISC. On December 28th, all attitude and ephemeris data was received for the missing data period to be processed. AQUA satellite data has resumed to nominal processing at the leading edge.<br><br> |
| HC_MYD_24032 | 2024-02-02 | 2024-02-02 | Note | Aqua Bad Telemetry On Feburary 1st and 2nd, 2024 (2024/032, 033), data losses occurred for MODIS AQUA (C61) due to irregular telemetry data. The impacted granules are 2024/032 08:40-10:20 (inclusive), 2024/033 09:20-11:05 (inclusive), 2024/033 17:50-19:15 (inclusive). The science data was degraded and not recoverable. The images below show the L1B global browse for 2024/032 and 2024/033 where the missing data occurred.<br><br><br> |
| HC_MYD_24031 | 2024-01-31 | 2025-02-25 | Note | MODIS Missing Ephemeris and Attitude inputs <h1>AQUA Missing Ephemeris and Attitude inputs (BoundingCoord Error)</h1> The rolling note here is to document the known occurrences of Aqua MODIS missing ephemeris and attitude inputs. As a result, the L1Bs will show gaps for the affected granules (click on the Global Browse link below) and the data is not recoverable. The data loss will be observed in the L1Bs and all downstream products.<br><br> <table class="style14" border="2"><tbody><tr><th>Date (DOY)</th><th>Date (mmddyear)</th><th>Version</th><th>Granule Loss</th><th>Global Browse</th><th>Note</th></tr><tr><td>2025/053</td><td>02/22/2025</td><td>C061</td><td>00:00-00:25</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2025053">2025/053</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2025/044</td><td>02/13/2025</td><td>C061</td><td>18:00-19:15</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2025044">2025/044</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2025/030</td><td>01/30/2025</td><td>C061</td><td>05:15</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2025030">2025/030</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2025/028</td><td>01/28/2025</td><td>C061</td><td>00:00-00:20 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2025028">2025/028</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/291</td><td>10/17/2024</td><td>C061</td><td>04:30-06:00 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024291">2024/291</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/262</td><td>09/18/2024</td><td>C061</td><td>13:10-14:40 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024262">2024/262</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/034</td><td>02/03/2024</td><td>C061</td><td>12:30-22:25 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024034">2024/034</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/029</td><td>01/29/2024</td><td>C061</td><td>16:45-18:05 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024029">2024/029</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/021</td><td>01/21/2024</td><td>C061</td><td>07:40-09:15 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024021">2024/021</a> </td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/017</td><td>01/17/2024</td><td>C061</td><td>00:00</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024017">2024/017</a></td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2024/009</td><td>01/09/2024</td><td>C061</td><td>22:00</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2024009">2024/009</a></td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2023/351-352</td><td>12/17-18/2023</td><td>C061</td><td>351/23:00-352/00:50 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2023351">2023/351</a></td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr><tr><td>2023/336</td><td>12/02/2023</td><td>C061</td><td>20:40-22:05 (inclusive)</td><td style="text-align: center;"><a href="https://landweb.modaps.eosdis.nasa.gov/details?id=239&date=2023336">2023/336</a></td><td style="text-align: center;">NorthBoundingCoord is less than SouthBoundingCoord</td></tr></tbody></table><p><br /><br /></p> |
| TM_MYD21_24016 | 2024-01-16 | 2024-01-16 | Note | AQUA Band 29 LST Crosstalk Drift MODIS Aqua Collection 6.1 (C61) Band 29 brightness temperature (BT) has been found to show significant upward trend since 2018 because of increased electronic crosstalk between PV LWIR bands. This drift is shown below over Ocean. |
| TM_MYD_23313 | 2023-11-14 | 2023-11-14 | Note | MODIS Data Gap 2023/313 On November 9th, 2023 (2023/313) the MODIS instrument experienced a data loss impacting granules 09:20:00 - 09:25:00 (inclusive). The data loss was caused by a weather event at ground station SG1. Snow on the ground station's antenna interfered with MODIS contact. The Impact Severity was ranked <b>3- Data Latency or Loss of One Orbit or Less</b>.<br><br>MODIS Gap Duration: 2023/313 09:21:59 - 2023/313 09:27:21z |
| HC_MYD_23269 | 2023-09-28 | 2023-09-28 | Note | 2023.269 data loss On September 26th, 2023 (2023/269), a data loss occurred for MODIS AQUA (C61) during a night-time orbit over Western Pacific Ocean. The impacted granules are 13:40-13:55 (inclusive). The data was degraded from the spacecraft and not recoverable. The image below shows the night-time L1B global browse for 2023/269 where the missing data occurred.<br><br><br> |
| TM_MYD_23248 | 2023-09-12 | 2023-09-12 | Note | 2023.248 AQUA Data Loss On September 5, 2023 (2023/248), AQUA MODIS suffered intermittent data loss during a nighttime orbit over Central Asia and the Indian Ocean. A data hit occurred on X-Band playback at 214110z causing many gaps between 0 and 2 seconds in duration. This resulted in 6969 CADUs lost from Partition 9. Intermittent data losses ranging from 0-2 seconds occur from 248/20:16:41 - 248/20:46:58. The data is not recoverable. The images below demonstrate the location of several of these data gaps in granule 20:35.<br><br><br><br> |
| TM_MYD_23252 | 2023-09-12 | 2023-09-12 | Note | 2023.252 AQUA Data Loss On September 9, 2023 (2023/252), AQUA MODIS suffered intermittent data loss during a daytime orbit over United States and South America. Due to a short contact, the last 23 seconds of the PB was not captured. This resulted in 239,021 CADUs lost from Partition 9. AQUA MODIS lost 7:21 minutes of data from 2023/252-19:39:54 - 2023/252-19:47:15. The data is not recoverable. The global browse image below illustrates the extent of the 2023/252 data loss.<br><br><br><br> |
| TM_MYD_23233 | 2023-08-21 | 2025-03-28 | Note | LOOps (Light-Out-Operations) Data Loss Record <h1>AQUA LOOps (Light-Out-Operations)</h1>This rolling note documents known occurrences of LOOps data loss events affecting AQUA MODIS. More information about these data loss events can be found here: <a href="https://landweb.modaps.eosdis.nasa.gov/displayissue?id=196" target="_blank" rel="noopener noreferrer">LOOps (Light-Out-Operations)</a><br><br> |
| HC_MYD_23203 | 2023-08-07 | 2023-08-07 | Note | 2023.203 data loss On July 22nd, 2023 (2023/203), a data loss occurred for MODIS AQUA (C61) during a day-time orbit over Eastern Africa and Eastern Europe. The impacted granules are 2023/203/11:11:26 - 203/11:49:03 (inclusive). A data hit occurred during the 11:28:51z AS2 playback. This resulted in gaps in MODIS and AIRS. No attempt was made to recover the data due to dump and go. The image below shows the Day-time L1B global browse for 2023/203 where the missing data occurred<br><br><br> |
| HC_MYD_23209 | 2023-08-07 | 2023-08-07 | Note | 2023.209 data loss On July 28th, 2023 (2023/209), a data loss occurred for MODIS AQUA (C61) during a day-time orbit over Greenland. The impacted granules are 2023/209/04:27:43 - 209/04:29:53 (inclusive). During the Lights Out period for DOY 209 Aqua/Aura were sharing a single Norway in-view as no other stations were in-view/available, this caused Aqua to have a short contact and for the Playback to play into the backorbit causing data to be lost. The image below shows the Day-time L1B global browse for 2023/209 where the missing data occurred<br><br><br> |
| HC_MYD_24353 | 2024-12-18 | 2024-12-18 | Note | MYD09CMG striping issue in band 5 <h1>MYD09CMG striping issue in band 5</h1>During the routine QA, a striping anomaly has been detected in the C61/MYD09CMG Band 5. The Band 5 detector issue is detailed on the NASA's <a href="https://mcst.gsfc.nasa.gov/time-dependent-list-non-functional-or-noisy-detector">MCST Known Issues Page</a>. The issue is observed for the entire MODIS/AQUA mission period and originating from AQUA Band 5's dead detector 20 involving degraded detector performance leading to inaccurate measurements. The input files MYD09IDT/N/S, which are used in the generation of MYD09CMG, rely on AQUA L1B data. However, the algorithm generating the input files using L1B data failed to flag the dead detector (detector 20) in Band 5, resulting in unusable Band 5 data in the C61/MYD09CMG product. Users of MYD09CMG data need to be cautious when interpreting measurements from this band. Science team has been informed and plans to address the issue in AQUA/C7 version. No issues were identified in the MYD09 products, and the 500m QA flags detector 20 in Band 5 as dead. <br><br><br> |
| HC_MYD_23208 | 2023-07-31 | 2023-07-31 | Note | 2023.208 data loss On July 27th, 2023 (2023/208), a data loss occurred for MODIS AQUA (C61) during a day-time orbit over North/West Africa and Atlantic ocean. The impacted granules are 2023/208/13:13:48 - 208/19:28:36 (inclusive). After nominal AOS, the OC called and advised they were not receiving X-band TLM. The station operator noted nominal X-band (and S-band) throughout the support. EDOS also advised they were not seeing any X-band TLM during the support. EDOS attempted to coordinate a station replay with but it was not received. The image below shows the Day-time L1B global browse for 2023/208 where the missing data occurred.<br><br><br> |
| TM_MYD28_23160 | 2023-06-15 | 2023-06-15 | Note | MxD28C3 Storage Values Discrepency On 6/9/2023, the science team found the storage capacity values in the lake information parameter file of the MODIS Global Water Reservoir 8-day product (MxD28C2) are inconsistent with the one used for the monthly product (MxD28C3) over the following locations:<br><br> Lake ID 23 (Okeechobee)<br> Lake ID 59 (Kovdozero)<br> Lake ID 73 (Storsjon)<br>Lake ID 119 (Kallsjon)<br> Lake ID 122 (Tshangalele)<br>Lake ID 161 (Lake Ross)<br><br>This discrepancy arises from the utilization of different sources for the reservoir capacity values, and only affects the 8-day storage values at these six locations (with a constant offset at each location). To ensure consistency, the lake information parameter file for PGE188 MxD28C2 has been updated. A reprocessing of the PGE188 MxD28C2 for the mission period will be conducted. <br><br> |
| TM_MYD_23133 | 2023-05-17 | 2023-05-22 | Note | Daytime Orbit Data loss 2023.133 (05.13.23) On May 13th, 2023 (2023/133), a data loss occurred for Aqua MODIS (C61) during a daytime orbit over the Central Hemisphere. The impacted granules are from 133/10:19:19 to 133/14:05:11 inclusive. No S-band was received from ground sites but another station captured the x-band data on the back up recorder. However, due to technical difficulties the data could not be transferred to EDOS. The data would be recovered later with a station replay. 2023/133 Aqua Level 0 and downstream products are not available until the data is recovered. The image below shows the L1B global browse for 2023/133 where the missing data occurs. |
| TM_MYD_23077 | 2023-03-20 | 2023-03-20 | Note | Daytime Orbit Data loss 2023.077 (03.18.23) On March 18th, 2023 (2023/077), a data loss occurred for Aqua MODIS (C61) during a daytime orbit over the Western Hemisphere. The impacted granules are from 077/23:05 to 078/00:00 inclusive. The impacted granules had missing ephemeris and attitude data and is not recoverable. The image below shows the L1B global browse for 2023/077 where the missing data occurs. |
| TM_MYD_23053 | 2023-02-28 | 2023-02-28 | Note | Nighttime Orbit Data loss 2023.053 (02.22.23) On February 22nd, 2023 (2023/053), a data loss occurred for Aqua MODIS (C6 and C61) during a nighttime orbit over the Eastern Hemisphere. The impacted granules are from 053/19:15 to 053/19:55 inclusive. The impacted granules had missing ephemeris and attitude data and is not recoverable. The image below shows the L1B nighttime global browse for 2023/053 where the missing data occurs. |
| TM_MYD_23037 | 2023-02-17 | 2023-02-27 | Note | Nighttime Orbit Data loss 2023.037 (02.06.23) On February 6th, 2023 (2023/037), a data loss occurred for Aqua MODIS (C6 and C61) during a nighttime orbit over the Eastern Hemisphere. The impacted granules are from 037/22:40:42 to 037/23:43:17 inclusive. The impacted granules had missing ephemeris and attitude data and is not recoverable. The image below shows the L1B nighttime global browse for 2023/037 where the missing data occurs. |
| PM_MYD_23027 | 2023-01-27 | 2023-01-27 | Note | Decommissioning of the MODIS C6 Forward Processing C6 Forward processing of Terra and Aqua MODIS Land data products will be discontinued, on February 15, 2023 (02/15/2023). The C6 land data products have always suffered from known calibration issues that were discovered by the instrument Cal/Val team after the completion of the C6 reprocessing. The main issue among these being the increased impact of optical crosstalk in the Terra PV LWIR bands 27-30, that had made retrieval of most atmospheric parameters infeasible, indirectly impacting some of the land products that were dependent on these atmospheric retrievals. The Collection 6.1 (C61) corrects for this and some other critical calibration issues and also has a number of product specific improvements and enhancements that are listed in the C61 change document<A href="https://landweb.modaps.eosdis.nasa.gov/data/userguide/MODIS_Land_C61_Changes.pdf"> here.</A><br><br>Given the improved performance and calibration of C61, users are requested to switch to C61 for all of their MODIS land data needs. DAACs, will retain the C6 historical land data products for a further period of 6 months, following this decommissioning of the C6 forward processing, and will decommission all C6 land data products after the expiry of this 6-month retention period.<br><br> |
| PM_MYD10_20300 | 2020-10-26 | 2020-10-26 | Pending | C61 Cloud Gap-Filled (CGF) products, MOD10A1F/MYD10A1F 2019 Users are requested to maintain caution, while using the C61 Cloud Gap-Filled (CGF) products, MOD10A1F/MYD10A1F for the first month of year 2019 (January 1st - January 31st). The said products for this first month of 2019 are expected to be a little unstable, as the very first day, 2019-001 was forced to run without using the CGF from the prior day (2018365) as expected. Any instability in these products are expected to diminish gradually, over the month of January and users can use these products, starting from the end of this month and onwards. January of 2019 will be re-processed later, with the expected CGF from 2018-365, once the trailing edge of C61 re-processing catches up to 2019. We will update this note as and when this happens and January of 2019 is re-processed.<br><br>The images below show MOD10A1F/MYD10A1F from 2019-001 side by side with the MOD10A1/MYD10A1 products, which shows that for this first day, the two products are identical.<br><br> |
| PM_MYD_19302 | 2019-11-05 | 2023-10-18 | Note | Semi-annual Night-time-day-mode calibration activity Rolling Note A routine calibration activity that happens every six months includes a portion of nighttime time data acquired in day mode and then a portion of day time data acquired in night mode. As a result, these periods include night time granules that contain a "day" flag during this calibration activity for granules over Africa. Additionally, granules appear missing in the global browse during the daytime time to compensate for the additional data in the buffer. The global browse image below shows an example of the impact from this calibration activity. This rolling note will document these semi annual occurrences.<br><br><br><br><b><center>************************************************ <p style="color:blue">Data users can access a complete entire mission list of all MODIS TERRA and AQUA Nighttime Day Mode Events, which includes this routine calibration activity<A href="https://mcst.gsfc.nasa.gov/modis-events-categories/routine-calibrations/nighttime-day-mode?event_date%5Bvalue%5D%5Byear%5D=2000&modis_mission=61"> HERE</A> </p> ************************************************</b></center><br><br><br><br><br><br> |
| HC_MYD_24348 | 2024-12-17 | 2024-12-19 | Note | 2013/082-083 geolocation shift <h1>2013/082-083 geolocation shift</h1> On March 23rd, 2013 (DOY 082), a geolocation artifact was observed in MODIS AQUA C61 data. The data quality was significantly degraded during the period from DOY 082 to DOY 083, with errors exceeding 0.5 km (~2 QKM pixels, ~1 HKM pixel, and ~0.5 1KM pixels). The geolocation team investigated the issue and the number of GCP matches were low with significant geolocation offsets (Figure 1 and 2). This may be due to inaccuracies in satellite positions, velocities, and/or attitude during these days, likely caused by solar storms. As a result, data loss was considered for C61/MODIS AQUA during this timeframe and the impacted granules span from 2013/082 12:05 to 2013/083 11:40 UTC (inclusive). Efforts are underway to correct the geolocation issue and recover the affected data, including the implementation of extended error detection outside the +/- 625m nadir equivalent for C7. The images below highlight the geolocation shift observed for DOY 082 and DOY 083 in the regions of South Africa (Figure 3) and Norway (Figure 4) respectively.<br><br><br> |
| HC_MYD_24295 | 2024-10-25 | 2024-10-29 | Note | 2024.295-296 data loss <h1>2024.295-296 data loss</h1>On October 25th 2024 (2024/295) and October 26th 2024 (2024/296), data losses occurred for MODIS AQUA (C61) due to issues with the scheduled contacts at ASF because of the ice storm. The impacted granules are 2024/294 14:00-15:25 (inclusive), 2024/295 23:30- 2024/296 01:15 (inclusive). The images below show the L1B global browses for 2024/295-296 where the missing data occurred.<br><br><br> |
| HC_MYD_24281 | 2024-10-07 | 2025-02-25 | Note | Aqua IIRV anomaly data loss <h1>AQUA IIRV Anomaly Data Loss</h1>On October 5th 2024 (2024/279), significant data losses occurred for MODIS AQUA (C61) due to an ongoing Improved Inter-Range Vectors (IIRV) anomaly during the last few days. Increased solar activity in the past few days has interfered with the ground stations' spacecraft tracking causing data loss during downlinks. The ground stations are working on adapting to the ongoing anomaly.<br><br> |
| TM_MYD_24242 | 2024-08-29 | 2024-08-29 | Note | AQUA False Fires <h1>AQUA False Fires</h1>On August 9, 2024, elevated radiance values were recorded in the MYD021KM Emissive data bands, impacting downstream products. The impacts are localized to granule 22:10 on DOY 2024/222. The anomalously high data was not flagged as invalid by the products' internal QA algorithm and the uncertainty index values are nominal despite the impacted data. The anomalous Band 22 Brightness and Temperature ranges from 300.4 K to 328.9 K. The elevated data values resulted in false fire reports in MYD14 / MYD14A1 Daily Thermal Anomalies (Active Fires) products. Impacts to thermal band 29 caused incorrect cloud-masking in the Land Surface Temperature products (MYD11 and MYD21). Granule 22:10 was hidden and the L2G+ recipes have been reprocessed for the day. The Level-2 products, the combined TERRA+AQUA products, and the N-Day products will not be reprocessed.<br><br> |
| HC_MYD_24150 | 2024-05-29 | 2024-06-13 | Note | 2024.150-151 data loss On May 29th 2024 (2024/150), data losses occurred for MODIS AQUA (C61) due to an issue with a contact at SGS. The loss is still under investigation but EDOS cannot replay the data from the antenna where the contact was received. The impacted granules are 2024/150 22:35- 2024/151 00:05 (inclusive). The image below show the L1B global browse for 2024/150 where the missing data occurred.<br><br><br> |
| HC_MYD_24146 | 2024-05-25 | 2024-06-04 | Note | 2024.146 data loss On May 25th 2024 (2024/146), data losses occurred for MODIS AQUA (C61) due to the data hits during the contact at 146/11:33. The impacted granules are 2024/146 10:30-11:15 (inclusive), 11:55-12:00 (inclusive). EDOS was able to replay the contact and recovered only part of the missing data. The images below show the L1B global browse for 2024/146 where the missing data occurred.<br><br><br> |
| HC_MYD_24083 | 2024-03-23 | 2024-04-04 | Note | Svalbard ground station power failure On March 22nd 2024 (2024/082), a data loss occurred for MODIS AQUA due to a power failure at the Svalbard ground station, introducing a hardware issue. The repair procedure was performed and completed. All scheduled contacts from the ground station had been missed since the incident and only partial data was recovered. Confirmed data losses are 2024/083 01:00-09:15 (inclusive), 23:55; 2024/084 00:00-09:55 (inclusive), 13:25-15:00 (inclusive); 2024/085 00:45-05:40 (inclusive), 07:40-08:55 (inclusive). The images below show the L1B global browse images for the missing periods. <br><br><br> |
