# Presentation: 604071

## Climate Data Modernization Program

- Historical Solar Observations - L16 (Continuing)

- _Dataset at Risk_ – NRL archives include a variety of solar photographic images (left) and spectra that are not readily accessible by the public. These data provide a scientific record of the sun that can be quantitatively compared to current solar observations.
- _Scope_ – Digitization of solar observations on film from  SKYLAB and HRTS.  This includes UV spectra and images from the S082A & B instruments and 10 HRTS rocket flight as well as H-alpha images from SKYLAB.  Includes scanning and key-entry of supporting documentation and observational data.

- _FY08 Accomplishments_ – Data rescue of daily solar H-alpha images with pointing information  from SKYLAB was completed.  Conversion of SKYLAB data files from TIFF to FITS format. Over the past 3 years HOV Services (then Lason) has digitized over 1600 plates of spectral images and 4800 UV spectra from SKYLAB film, and 4800 H-alpha images. This is 1.4TB of data available for scientific studies.
- _User Community Representatives_:
- - Dr. George Doschek, U.S.A.
- - Dr. Uri Feldman, U.S.A.

- _FY09 Activities_ – Digitize solar spectral observations by the HRTS (High Resolution Telescope/Spectrograph) from 10 rocket flights  and the Space Shuttle. Scanned spectra and images will be included in the publicly accessible NRL SKYLAB data base and made available through the World Data Center for Solar-Terrestrial Physics (Boulder) and NGDC.
- _Contractor Funding_:
- FY08	$65,000
- FY09	$65,000 (requested)

**Large Prominence Eruption Observed **
**By S082A Instrument on SKYLAB **

## Solar Cycle Variation of Solar UV Spectrum & the Impact on Climate 

- Historical Solar Observations (L-16)

- CDMP Data Rescue Effort

- Sun varies over 11-year cycle.

- Solar UV Spectrum

## What did the UV Sun Look Like Years Ago?

- Early sources of solar UV images and spectra are difficult to obtain
- Highly useful for comparison with modern day scientific studies and observations
**NRL Archives of film from SKYLAB and HRTS:**
- Original archives not available in electronic format
- Space-based observations are required to understand variability of solar UV and the impact on climate
- TIF scans to be done before degradation of film data
**Supporting data listed in books keyed in:**
**Exposure times, pointing, etc.**

- Solar Images Data Rescue

## NGDC/NRL Solar Data Rescue 

**NGDC/NRL Solar Data Rescue **

-   NRL reviews & QC images
-   TIFF images online at NRL web site
-   Files in archive in TIFF and FITS
-    format

**High resolution solar data (1973-1974):**
**S082A UV solar images**
**S082B UV spectra**
**Supporting data as PDF **
**  ****and Key-Entry data**
**H-alpha images scanned**
**  ****into TIFF files**

- SKYLAB H-alpha Images

- Solar Images Data Rescue

- SKYLAB point information

- Full disk solar UV Images

- Solar UV spectra – 8 per plate

## Developments to date:October 2008

**Completed scanning of UV solar spectra & images from SKYLAB (1973-1974):**
**Files converted from TIFF to FITS**
**Key entry of supporting data complete (exposure times, pointing, etc.)**
**SKYLAB H-alpha images scanned **

- Solar Images Data Rescue

**HRTS film data from 10 rockets flights (1975 –1997) and SPACELAB 2 (STS 51F, Challenger, 1985) transferred to HOV for scanning.**

**Individual SKYLAB**
**spectrum**

## Current Status of SKYLAB Archive

- <- Represents hard drives ->

- SKYLAB Instrument S082B
- Solar Spectral Data

- SKYLAB Instrument S082A
- Solar Image Data

**Note:** Dir_info_file will need
- some updating to reflect
- Archive structure.

- 344 GB/ 1031 files

- 364 GB/ 6432 files

## Future Processing

- Complete the scanning of HRTS UV spectra and Images into TIFF Files (HOV)
- Convert TIFF files to FITS format (NRL)
- Scan supporting flight documentation (HOV)

- Solar Images Data Rescue