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Update of LYRA level2

The calibration of LYRA data (level 2) has been updated on December 31 2016 00:00:00 to take into account new information about the evolution of dark current, as well as the result of the last calibration campaigns. This update currently results in a small amplitude jump in the timeseries. This jump should disappear the next time the data will be reprocessed, in a few months.


The first solar eclipse of 2017

On February 26th, lucky observers along the eclipse path in Chile, Argentina, Angola, Zambia and The Democratic Republic of the Congo have been able to witness an annular eclipse.

SWAP Calibration Campaign between 2017-Jan-11 00:00 UT and 2017-Jan-12 11:30 UT

We inform all PROBA2 data users that there will be no regular science data from SWAP between about 2017-Jan-11 00:00 UT and 2017-Jan-12 11:30 UT due to a special SWAP calibration campaign. LYRA data may sporadically be available during the campaign. However, we warn our users not to count on the availability of data from either of the sun-observing PROBA2 instruments during Wednesday and Thursday morning of this week.

PROBA2 Science Working Team Meeting 14

The PROBA2 team is pleased to announce the 14th PROBA2 Science Working Team (SWT) meeting, which will be held on Wednesday November 16, 2016 from 13:15 to 14:45 central european time at the European Space Weather Week. The meeting will be held in the Mercator room, where a small lunch is being offered.

Another eclipse!

We received the first data from LYRA and SWAP! Find all images and movies here. - Following the partial solar eclipse in March and the Mercury transit in May, there is one more celestial event in the making this year.

PROBA2 Science Working Team Meeting 13

SWAPUpdate: With exciting science talks and participation from all around the globe, SWT13 was a success. A big thank-you to all who contributed! Meeting notes can be found here.

Mercury Transit

Mercury Image courtesy of ESACelestial transits-where a celestial body is seen to pass across the solar disk from the perspective of the Earth-are relatively rare events. The planet Mercury undergoes around 13 transits a century, and Venus has a pair of transits approximately every 120 years. In 2012 the SWAP EUV imager on the PROBA2 satellite successfully observed a Venus transit of the Sun. On May 9, 2016, it was Mercury's turn! The Mercury transit was seen from Earth starting at 11:13 UT and ending at 18:42 UT. The total transit time was around 7 hours and 30 minutes.


What did we expect to see in SWAP observations? SWAP is an EUV telescope onboard the ESA PROBA2 satelite, it observes the Sun at roughly 1 million degrees from orbit around the Earth. Mercury is expected to be pictured as a small black disk crossing the face of the Sun, which would be seen as roughly 4 pixels in diameter. The PROBA2 team created a simulation of what SWAP was expected to see, which is shown in the video below. This simulation illustrates the path of Mercury as it crosses the Sun from the perspective of SWAP on PROBA2. The path of Mercury appears to 'wobble' as it crosses the Sun, but this is an artificial effect created by parallax from the changing perspective of Mercury in the PROBA2 field-of-view as the spacecraft orbits the Earth.

Seventh Call for PROBA2 Guest Investigator Program - Deadline Extended

Due to a recent surge in interest in the PROBA2 Guest Investigator program the proposal submission deadline has been extended to 2016-April-01. Those who have already submitted a proposal may re-submit their proposal if they wish to work on them more.

PROBA2 views Partial Solar Eclipse - 8 & 9 March 2016

On 2016 March 8 and 9, a solar eclipse took place over the Pacific Ocean. This eclipse was total -that is, the entire solar disk was covered by the Moon- over Indonesia and the central Pacific, starting at sunrise over Sumatra and ending at sunset north of the Hawaiian Islands. Additionally, large parts of South-East Asia, Alaska and Australia witnessed a partial solar eclipse. The path of totality had a maximum width of 155 km and the maximum duration was 4 minutes and 9 seconds at the point of greatest eclipse, which was over the waters of the Pacific Ocean.

SWAP Carrington Rotation Movies

Mini Carrington Rotation ImageWhen observing the Sun for a prolonged period of time, it soon becomes evident that features on its surface, and in its outer atmosphere do not rotate at the same rate. This is because the Sun is not a solid body, but a big ball of magnetised plasma, whose rotation is variable with position and height in the solar atmosphere. One of the most striking observations is that of ‘differential’ rotation, where features on the solar surface and in the solar atmosphere are observed to rotate faster at the equator (rotation period = 25.4 days) when compared to those closer to the poles (rotation period = 36 days). This is evident in observations of sunspots, which have been used as tracers for measuring solar motion for many years. 


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