Friday, October 11, 2019

Website Outage - 2019-10-11

Today, October 11, 2019, there will be a brief website outage due to maintenance. The start time for this outage is approximately 12 noon. We are sorry for any inconvenience this may cause.

Friday, September 13, 2019

Lunar Transit on September 28, 2019

SDO will experience a lunar transit on September 28, 2019. Here is a movie from the Flight Operations Team that shows SDO, the Sun, and the Moon during the transit. This transit lasts from 2044-2115 UTC (4:24-5:16 pm ET) and covers at most about 7% of SDO's view of the Sun.
The Moon moves from left to right during this transit. That makes it an SDO-overtake transit.

During the transit SDO will be in inertial mode with the fine-guidance system turned off. Images may jiggle around a little bit, but will continue to be observed and recorded.
Although you can see the Moon throughout the movie SDO's instruments cannot see the Moon when it is not covering the Sun. The little white flash seen in the Moon is the word "Moon" being written by the software and then quickly covered. The boxes drawn around and on the Sun help the FOT run the spacecraft. The time is displayed in the lower left corner of the movie. The first seven numbers are the year (2019) and the day of year (271). The six numbers after the period are the hour, minutes, and second of UTC (2 numbers each).
The next SDO Transit will be the Mercury Transit on November 11, 2019. We will have a webpage dedicated to the transit.

Wednesday, August 28, 2019

Station Keeping Maneuver #19 Today

SDO will execute Station Keeping Maneuver #19 today at 2222 UTC (6:22 p.m. ET). From 2200 to 2245 UTC (6:00-6:45 p.m. ET) science data may be missing or blurred. Station-keeping maneuvers are designed to keep SDO’s orbit in the right place when the spacecraft travels through the geostationary belt twice each day.

Wednesday, August 14, 2019

Momentum Management Maneuver #35 Today

SDO will execute Momentum Management Maneuver #35 today at 1911 UTC (3:11 p. ET). From 1830 to 1930 (UTC) science data may be missing or blurred.

Eclipse season started on 08 Aug 2019 and continues until 01 Sept 2019. Each day around midnight Mountain Standard Time (0700 UTC) the Earth passes between SDO and the Sun. This is a normal part of our geosynchronous orbit.

Wednesday, July 24, 2019

Today's Maneuver is the EVE Cruciform

SDO is executing the EVE Cruciform calibration maneuver today. Between 1100 and 1600 UTC (7:00 am--12 noon ET), science data and images may be blurry or absent.

Wednesday, July 17, 2019

Today's Maneuver and Website Upgrade

Today between 1500 and 2200 UTC (11:00 am-6 pm ET) SDO will execute the HMI roll maneuver. During this maneuver science may be missing or blurry.

The SDO website upgrade will be happening today and tomorrow. There will be times when the website is unavailable while the new servers are brought on-line and services restarted.

Wednesday, July 3, 2019

Today's Maneuver

SDO is running the EVE Field of View and HMI/AIA Flatfield maneuvers today. During these maneuvers the science data may be blurry or absent.