User Manual

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Index

Overview

Useful information on how to effectively use the search page

Useful information on how to effectively use the result page

Other useful information about this program

Browser requirements and Privacy statement

Version history

Useful Information on using result page effectively


Summary Plots

Here you will find a graphical representation of the data set that was returned by your query. This graphical image summarizes the nature of the data set that was returned.


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UVI & ATC times

Image times are listed on the result page in both 'UVI time' (default) and 'ATC time'. UVI time is the actual start time of each UVI integration. Polar telemetry data is tagged with ATC time, which is the time the instrument data is placed in the spacecraft telemetry stream. For UVI, the difference between UVI time and ATC time can be up to 74 seconds, depending on observing sequence (look here for more information).

If you request UVI data from a member of the UVI team, they will need to know the ATC time to find the requested image frames.


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UVI Browse Images

The time stamps of each record on the result page links to its corresponding UVI browse images.


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Sort on fields

The column headers on the result page are buttons which sorts each column in ascending order when clicked.


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Glossary

The following table expands and briefly explains the abbreviated terms you will see on the result page.

Abbreviation
Expansion
Brief explanation
SEQNO, FILTERS Operating Sequence Numbers, Filters UVI operations are defined by instrument sequences which define filter, gain, and integration settings. A summary of the most common sequence definitions is posted here.
DOORPOS Door Position UVI is equipped with a contamination door that is closed during spacecraft maneuvers and at other times. There are three possible door positions: OPEN, CLOSED and FULL EXTEND (abbreviated as FULLEX) during which the door is moving. Data should only be used when the door is OPEN or CLOSED.
UVIMODE Mode There are four possible modes for UVI: Idle, Normal, Star and Sync. Normal mode data is the only valid data for most scientific research.
SYSTEM Independent detector/electronic systems UVI has two independent detector/electronic systems that share a common optical path. These systems are referred to as the Primary and secondary systems. On July 30, 1996 the primary system became unstable and UVI switched to the secondary system on December 3, 2001.
GAIN Gain UVI has 16 gain settings with 16 being the most sensitive. A gain setting of 0 indicates the high voltage to the detector is off. Valid data for the primary system used gain settings of 13 and 14. The secondary system is operated with a fixed gain of 13.
SC_TLM_MODE, UVI_TLM_MODE Space Craft Telemetry Mode, UVI Telemetry Mode Normal telemetry modes are Science (SCI) for both the spacecraft and UVI. During spacecraft maneuvers both modes will be set to Manuever (MAN).
CCD_TEMP CCD temperature Of interest only to members of the UVI engineering team.
MCP_MON Monitor voltage of the multichannel plate Of interest only to members of the UVI engineering team.
BAFFLE Baffle temperature Of interest only to members of the UVI engineering team. This can vary significantly, depending on sun angle. This temperature does not affect the quality of UVI data.
GCIX, GCIY, GCIZ Polar spacecraft position, in GCI coordinates GCI coordinates are earth-centered, z-axis along Earth rotation axis, and x-axis pointing through the Prime Meridian.
GCIRA, GCIDEC Polar spacecraft attitude vector, given as Right Ascension and Declination, in radians This gives the location of a vector projected along the spacecraft spin axis. This is changed approximately every six months when the spacecraft is flipped.
UVIRA, UVIDEC Right Ascension and Declination of the center of the UVI field of view, in degrees. Useful for looking for stars.
DSPANG Despun Angle Nadir offset angle of the despun pointing platform in degrees. Positive offset is in a direction opposite to the spacecraft rotation. Zero degrees means the cameras are looking straight down at Earth. Angles larger than ~35 degrees are off-Earth.
UVIGLON, UVIGLAT Geographic longitude and latitude of the center of the UVI field of view, in degrees. This gives the point on Earth where UVI is pointing. The width of the UVI field of view is a function of spacecraft altitude.
UVIMLON, UVIMLAT Magnetic longitude and latitude of the center of the UVI field of view, in degrees. Same information, but expressed in Magnetic Apex coordinates.
ALT_RE, ALT_KM Altitude in terms of Earth Radii and Kilometers Distance of the spacecraft from the center of the earth.
SZA Solar zenith angle The angle between the sun direction and the local vertical direction on Earth. Angles less than 90 degrees are sunlit.
KP, AP, AP_AVG Magnetic indices AP_AVG is the daily average of AP.
SUNSPOT_NO International sunspot number Measure of number of visible sunspots.
F107 Ottawa 10.7-cm solar radio flux adjusted to 1 AU Measure of the strength of solar EUV radiation.
DST Disturbance storm index Measure of magnetic storms.
Epsilon Akasofu Epsilon parameter  Magnetopause power index.
Bx, By, Bz Interplanetary magnetic field OMNI GSM data
Velocity Solar wind velocity Vx component of the solar wind
Ion density Ion density
Dy pressure Dynamic pressure


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