Radio JOVE Spectrograph Users Group (SUG) [archived web page]

[NOTE: After a bit more than eight years, SUG decided on Dec 29, 2021 to merge its functions with the broader Radio JOVE group. These SUG web pages should continue to exist at least until their content is merged with the Radio JOVE web site. --dt, 12/30/21]

We are citizen scientists and professional radio astronomers working together to record and analyze Jovian and solar dynamic spectra leading to a better understanding of decametric radio emission processes. Or, herding cats for radio astronomy. Your choice.

The Spectrograph Users Group (SUG) is an extension of the Radio JOVE project. Consisting of people in the Radio JOVE community who use more complex radio spectrographs in addition to single-frequency Radio JOVE receivers, SUG participants have an interest in upper HF band spectrograph data covering a range of of about 15 to 30 MHz. This spectral data is more scientifically useful to radio astronomers both amateur and professional.

A recent SUG highlight is a Geophysical Research Letters journal paper on interesting spectrograph features caused by lightning and radio wave propagation.
Propagation Teepee: A Possible High Frequency (15–30 MHz) Remote Lightning Signature Identified by Citizen Scientists

Here are several documents describing who and where we are, what we do, and why we do it:
The SUG (2015) and SUG Capabilities (2016) and SUG Station Distances (2016) and SUG Capabilities (2018) and SUG Station Baseline Configuration (2019)

More info about the Radio JOVE program may be found here:
Radio JOVE Project Home Page and Radio JOVE Data Web Site

The following sections contain links to information of use to researchers and observers of Jovian decametric radiation.
Ephemerides Observation Reports RFI Examples Links
Observing Conditions Station Diagrams References Glossary
Publications Calibration Software  

Ephemerides – if you're going to observe Jupiter, you better know where it is and when it's there

All plots below are based on the JPL DE431 & JUP310 planetary and satellite ephemerides.

Jupiter Availability Plots 2010 to 2060 - AJ4CO (Eastern USA)
Jupiter Availability Plots 2010 to 2060 - LWA1 (Western USA)

Jupiter Observing Seasons 2010 to 2060 (TXT)

Jupiter Elongation 2007-2054 (PDF)
Jupiter Elevation at Transit for 30° N 2007-2054 (PDF)
Jupiter D-sub-e 2007-2054 (PDF)
Jupiter Path Loss 2007-2054 (PDF)
Jupiter Multi-Plot 2007-2054 (PDF)
Jupiter Elevations at Transit for Northern Hemisphere Observers Looking South 2010–2040 (PDF)
Jupiter Elevations at Transit for Southern Hemisphere Observers Looking North 2010–2040 (PDF)

HORIZONS Web Interface - JPL
Sunrise & Sunset Times - US Naval Observatory


Terrestrial Observing Conditions - the ionosphere is a harsh mistress

GOES X-Ray Flux (current) - NOAA
GOES X-Ray Flux data archive - NOAA

US TEC map (current) - NOAA
US TEC data archive - NOAA

D-RAP map (current) - NOAA
D-RAP data archive - NOAA

Planetary K Index, 3-Day Plot (current) - NOAA
Planetary K Index, 3-Day Plots (archive) - NOAA

K Indices, 7-Day Plot (current) - NOAA

Solar Events (current day) - NOAA
Solar Events (archive, text format, 29 Jun 2015 to present) - NOAA
Solar Events (archive, g-zipped tarball format, 31 Jul 1996 to present) - NOAA - News and information about the Sun-Earth environment

CONUS lightning activity map (current) - Vaisala
Global lightning activity maps (current and historical) - Blitzortung

CONUS Weather Radar (current) - NCAR - VE3EN

Total solar eclipse of 21 Aug 2017 - Maps and information (NASA)
Eclipse path data (NASA)
Eclipse interactive map (EclipseWise)


Publications - material we've written to report our findings and to help others – but also so we don't forget what we've learned


Observation Reports and SUG Phase Plane Plots - some of the fruits of our labors

If you are not a Spectro Users Group contributor, please obtain permission from the author(s) before re-publishing this material.


Station Diagrams - smut for radio telescope engineers

AJ4CO (as of 02 Feb 2020)
Heliotown (as of 07 Feb 2017)
HNRAO (as of 01 Oct 2019)
K4LED (as of 01 Sep 2019)
LGM (as of 01 Dec 2019)
MTSU (as of 25 Mar 2017)
WCCRO (as of 10 Oct 2019)
Cohoe (tbd)
MRAO (tbd)
PARI (tbd)
RHO (tbd)
Severance (tbd)


Calibration Instructions - if you're going to do it, do it right

Spectrograph Step Calibration Procedure, January 2017
SUG Loaner Noise Source Temperatures.xls
HP 461 Measured Noise Output Temperatures 2013


System Calibration Reports - the results of doing it right

Step Cal Reports - Notes on How to Use Them

AJ4CO - DPS Summary All Files 26 Jul 2015
AJ4CO - UFRO Summary All Files 26 Jul 2015
AJ4CO - TWB Summary All Files 20 Dec 2013
Heliotown Summary All Files 29 Jan 2017
HNRAO Summary All Files 05 Mar 2017
K4LED Summary All Files 16 Aug 2017
LGM Summary All Files 19 Dec 2015
MRAO Summary All FIles 30 Jul 2013
MTSU Summary All FIles 25 Mar 2017


Reference Material - good stuff that wasn't written with SUG in mind


Software- Files needed for using RSP, RSS, and some SDRs

Right-click on the file hyperlink, select "Save Link As..."


Links - handy stuff at other web sites


Alphabet Soup - a glossary of mysterious codes

CA – Correction Array
A numeric array or matrix of correction values that can be applied to spectral data to flatten a displayed spectrogram in terms of frequency response.

CDF - Common Data Format
A library and toolkit that was developed by the National Space Science Data Center (NSSDC) at NASA starting in 1985. The software is an interface for the storage and manipulation of multi-dimensional data sets.

CSV – Comma Separated Values
A common data exchange file format that is widely supported by consumer, business, and scientific applications. Easily used with Excel and other spreadsheet software.

FITS - Flexible Image Transport System
An open standard defining a digital file format useful for storage, transmission and processing of scientific and other images. FITS is most commonly used in astronomy.

GRAPE – Great Radio Atmospheric Propagation Experiment
A group of experiments and subsequent analyses of the effects of the 17 Aug 2017 solar eclipse upon terrestrial radio propagation.

HEC – Heliophysics Educational Consortium
This term is deprecated, see NSSEC.

NSSEC – NASA SPace Science Educational Consortium

PADC – Paris Astronomical Data Center

PDS – Planetary Data System

PPI – Planetary Plasma Interactions
A node within the PDS that pertains to what we do in the SUG. This node is hosted at UCLA.

RHO – Rosemary Hill Observatory
An observatory south of Gainesville, Florida. Operated by UF.

RSP – Radio Sky Pipe
The software we use to digitize audio from the Jove receiver, display and save single-channel data, and serve this data as well as view it in client mode. RSP produces data files with a ".spd" extension.

RSS – Radio Sky Spectrograph
The software we use to run the spectrographs, display and save spectral data, and serve this data as well as view it in client mode. RSS produces data files with a ".sps" extension.

SPASE – Space Physics Archive Search and Extract
a project containing, among other things, a metadata model described here:

SWEOC – Space Weather for the Emergency Operations Center
This resource brings together images, text based reports, and data plots that are in real-time from various prime sources that maybe used in an Emergency Operations Center (EOC). All are configured in the highest quality graphics for use on a HD quality EOC projection system. This website supports the Space Weather Prediction Center, Emergency Management, and Amateur Radio.

UF – University of Florida

UFRO – University of Florida Radio Observatory
Located at various places over the years. First on campus where the police station now stands, then at Bivens Arm Lake, and finally from 1970 onward at a 55-acre site in Dixie County a few miles south of Old Town.

VO Paris – Virtual Observatory Paris
This term is deprecated, see PADC.


Last update 30 Dec 2021.
Page maintained by Dave Typinski, davetyp at typnet dot net