1 Mode Parameter Variations from GONG Ring Diagrams: An Update Rachel Howe, NSO.

Slides:

Advertisements

Similar presentations

1 GONG Magnetogram pipeline. 2 The GONG Data Processing Pipeline

Advertisements

Parametric Modeling Parametric Modeling

HMI Data Analysis Software Plan for Phase-D. JSOC - HMI Pipeline HMI Data Analysis Pipeline Doppler Velocity Heliographic Doppler velocity maps Tracked.

Pg. 472 Homework Pg. 324#70 – 76 all #1ɣ = 68°, b = 3.88, c = 6.61 #2α = 35.97°, ɣ = 34.03°, c = 4.76 #3 = °, b = 27.55, c = #4No triangle.

Global Dynamics Rachel Howe, NSO Session H10. Synopsis Achievements from GONG/MDI –Nearly a full 11yr cycle of observations –Zonal flow pattern in bulk.

A particularly obvious example of daily changing background noise level Constructing the BEST High-Resolution Synoptic Maps from MDI J.T. Hoeksema, Y.

CS 128/ES Lecture 5a1 Raster Formats (II). CS 128/ES Lecture 5a2 Spatial modeling in raster format  Basic entity is the cell  Region represented.

Data for Helioseismology Testing: Large-Scale Stein-Nordlund Simulations Dali Georgobiani Michigan State University Presenting the results of Bob Stein.

R. Komm & Friends NSO, Tucson R. Komm & Friends NSO, Tucson Solar Subsurface Flows from Ring-Diagram Analysis.

Basics: Notation: Sum:. PARAMETERS MEAN: Sample Variance: Standard Deviation: * the statistical average * the central tendency * the spread of the values.

Study of magnetic helicity in solar active regions: For a better understanding of solar flares Sung-Hong Park Center for Solar-Terrestrial Research New.

Helioseismic Holography & some experiments on “field effects” in CR1988 NorthWest Research Associates Colorado Research Associates Division D. Braun.

Advanced Technology Center 1 HMI Rasmus Larsen / Processing Modules Stanford University HMI Team Meeting – May 2003 Processing Module Development Rasmus.

A particularly obvious example of daily changing background noise level Constructing the BEST High-Resolution Synoptic Maps from MDI J.T. Hoeksema, Y.

STARTER This graph of tangential velocity vs. angular velocity for a point on a spinning disc, indicates that the point is what distance from the center.

By D. Fisher Geometric Transformations. Learning Targets I can draw transformations of reflections, rotations, translations and combinations of these.

Image Compression JPEG. Fact about JPEG Compression JPEG stands for Joint Photographic Experts Group JPEG compression is used with.jpg and can be embedded.

S. White, LBS 17 May Van Der Meer Scans: Preliminary Observations.

Science Requirements for Helioseismology Frank Hill NSO SPRING Workshop Nov. 26, 2013.

F.M.H. Cheung School of Physics, University of Sydney, NSW 2006, Australia.

1 Status of Ring-diagram Analysis of MOTH Data Kiran Jain Collaborators: F. Hill, C. Toner.

An Introduction to Helioseismology (Local) 2008 Solar Physics Summer School June 16-20, Sacramento Peak Observatory, Sunspot, NM.

Resident Categorical Course

Speed vs. Time Graphs.

P MODE TRAVEL TIME IN ACTIVE REGIONS USING TIME-DISTANCE METHOD CRAAG, Observatory of Algiers, BP 63 Bouzareah 16340, Algiers, Algeria. (1)

The diagram shows weather instruments A and B.

Digital Image Processing Lecture 7: Geometric Transformation March 16, 2005 Prof. Charlene Tsai.

MWO MAGNETOGRAMS L. Bertello, R.K. Ulrich, J. Boyden and T. Tran Magnetogram Workshop, UCLA, April 2-4, 2007.

LNGS 25 May 2005 G. Sirri – INFN BO1 Test of a dry objective with correction collar Dry objectives having an high numerical aperture give aberration when.

Section – Ratio, Proportion, Variation The Vocabulary.

Display of Motion & Doppler Ultrasound

An Introduction to Helioseismology (Global) 2008 Solar Physics Summer School June 16-20, Sacramento Peak Observatory, Sunspot, NM.

Rabello-Soares, Bogart & Scherrer (2013): Comparison of a quiet tile with a nearby active region (5 o to 8 o away) with a quiet tile with no nearby.

Techniques for Active Region Seismology Irene González Hernández National Solar Observatory, Tucson, AZ.

Artificial ‘Physics-light’ Ring Data Rachel Howe, Irene Gonzalez-Hernandez, and Frank Hill.

1 Global Helioseismology 2: Results Rachel Howe, NSO.

Holography far-side images with HMI Irene Gonzalez Hernandez Charlie Lindsey Richard Bogart Phil Scherrer Sebastian Couvidat, and the calibration team.

7- 1 Chapter 7: Fourier Analysis Fourier analysis = Series + Transform ◎ Fourier Series -- A periodic (T) function f(x) can be written as the sum of sines.

Meridional Circulation Variability from Large-Aperture Ring Diagrams Irene González Hernández Rudi Komm Thierry Corbard Frank Hill Rachel Howe Deborah.

Rachel Howe.  Why do we need to continue observing?  Why ground-based?  Requirements for a new network.

SALT Flat Field Investigation Tad Pryor, Saurabh Jha, Darragh O’Donoghue, Ted Williams November 2012.

Three-Dimensional Power Spectra of GONG++ High- Cadence Magnetograms F. Hill, J. Bolding, R. Clark, K. Donaldson-Hanna, J. Harvey, G. Petrie, C. Toner.

Searching for the Magnetic Fields at the Base of the Convection Zone Dean-Yi Chou Institute of Astronomy & Department of Physics Tsing Hua University,

776 Computer Vision Jan-Michael Frahm Spring 2012.

Subsurface Convective Flows within Active Regions Bradley W. Hindman Deborah A. Haber Juri Toomre JILA/University of Colorado.

Air Pressure and Winds II. RECAP Ideal gas law: how the pressure, the temperature and the density of an ideal gas relay to each other. Pressure and pressure.

1 Berger Jean-Baptiste

Image Enhancement Band Ratio Linear Contrast Enhancement

Date of download: 6/22/2016 Copyright © 2016 SPIE. All rights reserved. Schematic representation of the near-infrared (NIR) structured illumination instrument,

PERSISTENT STRUCTURES IN NEAR- SURFACE FLOWS FROM RING DIAGRAMS RACHEL HOWE, UNIVERSITY OF BIRMINGHAM D. BAKER, MSSL R. KOMM, NSO R. BOGART, STANFORD.

Date of download: 6/28/2016 Copyright © 2016 SPIE. All rights reserved. Absorptive transillumination imaging of intramyocardial scroll waves: (a) schematic.

Helioseismology for HMI Science objectives and tasks* Data analysis plan* Helioseismology working groups and meetings *HMI Concept Study Report, Appendix.

Estimation of acoustic travel-time systematic variations due to observational height difference across the solar disk. Shukur Kholikov 1 and Aleksander.

Edward Rhodes LoHCo Meeting Tucson, AZ December 14, 2005

A segmentation and tracking algorithm

Volume 11, Issue 1, Pages (January 2014)

HMI Data Analysis Pipeline

Volume 109, Issue 2, Pages (July 2015)

HMI Data Analysis Pipeline

Hippocampal “Time Cells”: Time versus Path Integration

Volume 114, Issue 6, Pages (March 2018)

Distance-Time graph.

Chapter 2 Functions, Equations, and Graphs

Sushanta C. Tripathy NSO, Tucson

Rachel Howe, NSO December 2005

Something New About Frequency Shifts

Sushanta C. Tripathy National Solar Observatory

How Cells Tiptoe on Adhesive Surfaces before Sticking

Variations of Solar Acoustic Radius from GONG low-L data

Maxwell H. Turner, Fred Rieke Neuron

Presentation transcript:

1 Mode Parameter Variations from GONG Ring Diagrams: An Update Rachel Howe, NSO

2 Synopsis Lots of Data! Frequency shifts Power maps and amplitude shifts Summary

3 Lots of Data We now have about 30 Carrington Rotations of GONG+ data analyzed, contiguous from and then days, 114,345 dense-pack cubes. That’s 12Tb of data in the tracked velocity cubes. About 2.5Gb just in parameter tables.

4 Frequency Shifts One rotation, after subtraction of geometric terms, for l=652, n=3

5 Frequency shifts, 25 rotations

6 Frequency variations from 25 rotations

7 A thought Availability of frequencies for many rotations should allow detailed study of effect of active region evolution on local sound speed profile.

8 Parameter sensitivity to B, by rotation Linear (left) and quadratic (right) coefficients for fits of frequency (top), and amplitude (bottom) against B. Colored ribbons correspond to different n. B from MDI daily synoptic images. Amplitude sensitivity seems to vary from rotation to rotation.

9 Power Maps Take each tracked merged image (MI) data cube. Perform temporal FFT for each spatial pixel. Write 4-plane FITS file containing low-frequency (0.5 < < 1.5 mHz), 5-minute (1.5 < < 5.5 mHz) and high-frequency (5.5 < <7.5 mHz) total power, and mean velocity. Gzipped file is 0.25Mb for each dense cube.

10 Power Maps Mosaic for one day (patches normalized separately: apparent gradient is artifact of overlap order). Take mean for each patch … and subtract fit to distance from disk center.

11 Geometric Term in Amplitude Power vs distance from disk center, from rings (left) and power maps (right). Slope does not look constant.

12 Slope of power against , from ring diagram fits. Possible correlation with apparent radius? Time (days) Or with B?

13 Summary GONG data are now plentiful! Power maps will be available. 5-minute power scaling not completely understood. –Ideas welcome. Stay tuned!