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Monday, November 20, 2017

Why Look at the Sun from Space?

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SDO is one of fleet of satellites watching the Sun and recording the data that we use to study the solar magnetic field. The Sun was one of ...
Wednesday, November 1, 2017

Is the Sun Getting Brighter?

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I was asked whether SDO measures the total output of the Sun and whether an increase in that output could be causing the temperature of the ...
Thursday, October 19, 2017

Today's Lunar Transit

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It was a lovely fall day in Maryland. A perfect day for a lunar transit! Here's an AIA 171 Å image showing the Moon blocking a slice o...
Wednesday, October 4, 2017

EVE Field of View and AIA/HMI Flatfield Maneuvers today

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The wobbling images tell us that another round of calibration maneuvers has started. Today we have the EVE Field of View and AIA/HMI flatfie...
Wednesday, July 26, 2017

Momentum Management Maneuver #30 today, 1925-2000 UTC

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SDO will perform Momentum Management (Delta-H) Maneuver #30 today. From 1925-2000 UTC (3:25-4:00 pm ET), SDO science data may be missing or ...
Thursday, July 6, 2017

Remainder of 2017 Maneuvers and two Lunar Transits

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The next set of SDO maneuvers and other niceties has been released. July 5, 1818 UTC 1320-1920 UTC (10:20 am ET - 3:30 pm ET) - EVE FOV a...
Thursday, June 15, 2017

Measuring the International Sunspot Number

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I was in Brussels visiting the Royal Observatory Belgium to talk about improving the accuracy of the International Sunspot Number. The ISN i...