Data Updates

9/27/2021

Updated GOLD data release notes to Rev 4.3: https://gold.cs.ucf.edu/documentation/

9/14/2021

Updated GOLD data release notes to Rev 4.2: https://gold.cs.ucf.edu/documentation/

9/6/2021

The daytime, full-disk imaging cadence of GOLD was decreased beginning on 9/6/2021 to extend the instrument’s capability to provide observations of the atomic oxygen 135.6 nm emissions, which are essential to three GOLD Level 2 data products: NMAX (in the nighttime ionosphere), ON2 and QEUV (both on the dayside).

As described in the GOLD data release notes (https://gold.cs.ucf.edu/documentation/), sensitivity to the OI 135.6 nm emission decreases as the total number of photons detected increases. To mitigate sensitivity loss, a grating yaw mechanism (GYM), which rotates the grating slightly to move the 135.6 nm emission to a less used location on the detector, is part of the instrument design.

Daytime airglow emissions are the dominant contributor to the total fluence of 135.6 nm photons and, therefore to sensitivity decline at 135.6 nm. Because the useful range of motion for the GYM is limited, the GOLD team has reduced the cadence of daytime observations in order to extend production of the 135.6 nm-dependent data products. In addtition, stellar occultation observations are now being restricted to nightside occultations only. Changes in the spatial coverage of daytime observations can also contribute to extension of observations, and a final choice for the tradeoff between temporal cadence and spatial coverage is yet to be completed.

8/5/2021

Updated GOLD Science Data Products Guide to Rev 4.2: https://gold.cs.ucf.edu/documentation/

7/7/2021

GOLD Level 1B data is now available from NASA’s Space Physics Data Facility (SPDF): https://spdf.gsfc.nasa.gov/

6/24/2021

Updated GOLD data release notes to Rev 4.1: https://gold.cs.ucf.edu/documentation/

5/20/2021

Updated GOLD Science Data Products Guide to Rev 4.1: https://gold.cs.ucf.edu/documentation/

4/2/2021

New versions of GOLD Level 1 and Level 2 data are now available.

This release includes a full reprocess of all Level 1C and Level 2 data products. The Level 1 changes include updated radiometric calibration and an updated background subtraction, as well as several other changes.  All Level 2 data products have been reprocessed using the new version of L1C data, as well as improved algorithms for the ON2, QEUV and TDISK data products.  See the release notes for additional details (link to documentation below).

The dates currently available for each GOLD data product can be found on the Current Data Product Versions page at https://gold.cs.ucf.edu/data/current-data-product-versions/

Updated documentation for GOLD data products is available at gold.cs.ucf.edu/data/documentation

3/26/2021

L1B data from a special Waves Campaign (October 17-19, 2019) has been made available for download on the Campaigns page: https://gold/cs.ucf.edu/data/campaigns

Information regarding correction of altitude errors in Stellar Occultation data that result from timing errors due to drift in the onboard clock has been added to the tools page: https://gold.cs.ucf.edu/data/tools

11/24/2020

Updated GOLD data release notes to Rev 3.8: https://gold.cs.ucf.edu/documentation/

11/19/2020

Updated GOLD data release notes to Rev 3.7: https://gold.cs.ucf.edu/documentation/

10/22/2020

Updated GOLD data release notes to Rev 3.6: https://gold.cs.ucf.edu/documentation/

9/22/2020

Updated GOLD data release notes to Rev 3.5: https://gold.cs.ucf.edu/documentation/

8/28/2020

Updated GOLD data release notes to Rev 3.4: https://gold.cs.ucf.edu/documentation/

4/16/2020

Updated GOLD data release notes to Rev 3.3: https://gold.cs.ucf.edu/documentation/

4/8/2020

Additional GOLD Level 2 data are now available.

All L2 TLIMB data have been reprocessed to version 03 due to a minor correction in the algorithm to properly handle filtering of solar zenith angle, and the initial version of the L2 NMAX product has now been released.

All L2 data products (ON2, QEUV, TLIMB, O2DEN, TDISK, and NMAX) are currently available through 3/29/20 and will continue to be released on a regular basis going forward. The dates currently available for each GOLD data product can be found on the Current Data Product Versions page at https://gold.cs.ucf.edu/data/current-data-product-versions/

Updated release notes for GOLD data are available at https://gold.cs.ucf.edu/documentation/

12/6/2019

Channel A L1C and L1D data are now available through 11/30/2019.  Data will continue to be released on a regular basis going forward.  The dates currently available for each data product can be found on the Current Data Product Versions page at https://gold.cs.ucf.edu/data/current-data-product-versions/

Channel B L1C and L1D night time (NI1) data are also now available through 11/30/2019.  The CHB NI1 data from the period 12/15/18-3/15/19 are available by request only through a link on the GOLD download page at https://gold.cs.ucf.edu/data/search/.  See section 3.1.5 of the GOLD data release notes for details on the issues with the CHB NI1 data during that time period.

Updated release notes for GOLD data are available at https://gold.cs.ucf.edu/documentation/

9/16/2019

GOLD L1C and L1D data have been updated to include a flat-field correction, as well as an improved occultation background subtraction. GOLD Level 2 data have been updated based on the new L1C data. This release also includes the initial version of the L2 QEUV data product.

Both L1 and L2 data are currently available through 8/13/2019, with the exception of L2 QEUV data, which are currently available through 1/31/2019. Updated documentation is available at gold.cs.ucf.edu/data/documentation

6/4/2019

The first release of GOLD Level 2 data is now available for download. This initial release of L2 data includes TDISK, TLIMB, and O2DEN data (through 3/14/2019) and ON2 data (through 12/31/2018). Information about these L2 data products is available in the updated data documentation available at gold.cs.ucf.edu/data/documentation/

The Level 1 Night data (L1C NI1 and L1D NI1) have been updated to version 02, and are also available for download. This update fixes the previous issue with incorrect radiances being reported in the data files.

5/14/2019

On May 12, an error in the calculation of the nightside disk radiances was discovered in the code generating the L1C NI1 files. The count rates and the counts per second are not affected. Only the radiances reported for nightside disk imaging are affected. This affects all of the L1C nightside disk data generated in version 01. The radiances will be corrected in the next data release and the documentation for the data will be updated shortly. Registered users will receive notification of updates.

3/8/2019

Initial release of GOLD Level 1 Data. Documentation is available at gold.cs.ucf.edu/data/documentation/