Data Collection Help
Description Glossary
Sample Selection Form
Sample Entry Form

Data Service Help
Description Glossary
Sample Entry Form

CfA NVO

International Virtual
Observatory Alliance

Each new data service for a given data collection is initialized with the values of the previous data service for that data collection. If an data collection is copied, the first data service entry is copied along with the basic data collection information.

Data Service Name

Specify a name for this data service and a URL where it is described.

How would you characterize the Data Service?

Check off the format which best characterizes this data service.

Table	Mosaic Image	Structured Binary Data
Hypermap	2D Image	Multiple Data-Type Object (such as multi-extension FITS)
Hypercube	Histogram/1D Image	Other _________________
Hyperimage	Bit Stream

Data Format/ Header Conventions

A. In what form is the data returned from the data collection? ( ASCII, FITS, VOTable, Web Page, Other )

B. Which Header Keyword Conventions are followed? ( FITS, HEASARC, FITS-WCS, Other ) URL(s) to convention(s)

C. Local conventions and URL thereto (all keywords in headers should have an online definition somewhere)

D. A reference to a sample of this data service.

Typical Parameters (per instrument or configuration)

A. Frequency/wavelength range (this might be same as data collection)

B. Spatial dimensions

C. Temporal range of individual data

D. Polarization (this might be same as Accuracy)

E. Intensity/Flux (faint and bright limits)

Resolution/Accuracy (per instrument or configuration)

A. Frequency/wavelength

B. Spatial (e.g., arcmin, arcsec, milliarsec)

C. Temporal

D. Polarization

E. Intensity/Flux

If applicable, how are coordinate systems represented.

- keyword/property (standards: WCS, IRAF)

- associated extension

- associated data service

- other _______________

Which of the following items can be directly extracted from the data service?

Unique ID	Units
Data Type	Range of legal values
Dimensionality	Object Name(s)

Data Quality

A. Does the data collection have explicit information about data quality?

B. Is there a per-observation data quality flag?

C. How should one distinguish between multiple and/or overlapping data sets?

Calibration services

A. Are Calibration services associated with this service? Y/N

B. Can these calibration services be obtained through the data collection? Y/N/Included

C. Fill out Data Service questions for each calibration service.

How are Data Uncertainties represented?

They aren't

In data file: with data separate extension

In an associated data service __(name)____

Other

Indicate the level of Data Fidelity

A) What is the current state of this data?

- raw

- semi-processed

- completely processed

- other ______________

B) What software and/or processing steps have been used to get to the current state?

C) What software and/or additional services are needed to process the data to completion?

Observation Provenance

Indicate how the following information is obtained:

A) Project/Observing Program (ie: Chandra GO Cycle 2, Sloan Survey, VLA NVSS)

B) Program/Observation subset(ie: HST Deep Field N, Galactic Plane Survey )

Include program name and name of principal investigator

C) Observation:

Observation Configuration

A. Specific configuration for this data service.

B. Indicate how the following information is obtained:

- Target

- Telescope ( Name, Location )

- Grating

- Filters

- Detector

- Digitizer

Data Collection Entry Help