Long Term Planning and Remote-Sensing Windows information

Target: NOAA active region complex including ARs 12955, 12957, 12961. Boundary of AR 12957. On Disk.

See: Slow Solar Wind Connection Science during Solar Orbiter's First Close Perihelion Passage (RSWs 1&2)

(Yardley et al. 2023, ApJS, 267, 11)

Multi-source Connectivity as the Driver of Solar Wind Variability in the Heliosphere (RSW1)

(Yardley et al. 2024, Nat Astr., 8, 953)

Hinode via HOP429

Summary of EIS observations for the period

EUI/HRIEUV:successful

EUI/HRILYA:successful but remnants

SPICE:successful but corners

PHI/HRT:no data due to internal problem

SOOP name appears asCOORD_CALIBRATION

See also:https://www.sidc.be/users/emilk/viewer/v2.html

Southern polar coronal hole boundary (2022-03-17 06 UT - 2022-03-18 18:40 UT)

NOAA AR 12967 (2022-03-18 18:40UT - 2022-03-22 00UT), decayed positive polarity

Both on disk

See: Slow Solar Wind Connection Science during Solar Orbiter's First Close Perihelion Passage (RSWs 1&2)

(Yardley et al. 2023, ApJS, 267, 11)

Hinode via HOP436

Hinode started observing on 2022-03-23 until 2022-04-04

Hinode: no coordination although Hinode was running HOP 446 for a possible flare precursor event between 2022-10-14 and 2022-10-17

Summary of the EIS observations for the period

Hinode: no coordination although Hinode was running HOP 446 for a possible flare precursor event between 2022-10-14 and 2022-10-17

Summary of the EIS observations for the period

ALMA on 20, 21, 25

Amateur network

BBSO, THEMIS (no data available), VLA,UcoMP

Fully failed due to SSMM issue.

SOOP name appears as COORD_CALIBRATION

east limb

EUI/FSI at 10-minute cadence in both passbands

EUI/HRI_EUV at 60-second cadence

STEREO-A Opposition on 2023-03-24

This is a full-disk, high-resolution SOOP specifically designed to capture eruptive events with a disk-center pointing.

We observed numerous CMEs during all Eruption Watch campaigns (Metis and SolOHI). For some events, we were able to track their evolution from the disk to several solar radii.

Hinode 27th

Hinode 28th

Full corona with particular focus on the regions at the interface between streamers and coronal holes.

disk-centre pointing.

no particular events occurred during the SOOP run.

Ngampoopun et al. submitted: Investigating solar wind outflows from open-closed

magnetic field structures using coordinated Solar Orbiter and Hinode observations

This is a full-disk, high-resolution SOOP specifically designed to capture eruptive events with a disk-center pointing.

We observed numerous CMEs during all Eruption Watch campaigns (Metis and SolOHI). For some events, we were able to track their evolution from the disk to several solar radii.

North Pole. Not visible from Earth.

Hinode observed South Pole as Earth had a better view of the South Pole while Solar Orbiter had a good view of the North Pole.

This run was specifically interesting because its duration was much longer than before. The data exhibit a rich phenomenology on all temporal scales down to 20s.

Off-limb corona (full-FOV). Binning for Metis: 2x2 in VL. High cadence observation: from 1 s (fixed polarization) to 20 s or 60 s (total brightness).

Interesting downflows in an open-field region. Analysis in progress. First presentation of the results at the upcoming Metis Science Team Meeting in January (Naples, Capodimonte Astronomical Observatory, 27-29 January 2025).

Coronal hole on disc emitting fast wind that is then measured by SolO

coronal hole, coronal hole bright points, filament channel, failed eruption

Presentation: SST observations by Sanja Danilovic https://espos.stream/2024/05/02/Danilovic/. Publications in early stages of preparation by Alex James and Stephanie Yardley on the successful Orbiter connectivity and the failed eruption observed with EUI/HRI to the north of the coronal hole.

IRIS (in quadrature)

Coordinated IRIS observations (images and spectra) to capture the transition region response which is not captured through Solar Orbiter.

It was targeted on an AR. The science goal was to capture the AR dynamics caused by small-scale emergence near AR loop footpoints. The AR was not adequately visible from Earth-based assets.

An exciting aspect of this SOOP is the presence of a large moss region. Moss is known to be variable up to a few to tens of seconds, although the exact nature of such variability remains unknown. One of the PhD students at MPS is looking at this aspect in a statistical way, and this dataset is also part of that study.

Caught quiet sun region close to disk centre. EUI is already using the dataset for campfires analysis.

SST, GREGOR, DKIST.

Earth based assets (HMI,Hinode,SST,Gregor,IRIS) could all observe as the ARs were visible from Earth, but near to the limb to start with on both occasions. SST,Gregor could provide some Halpa/magnetograms. Excellent datasets from SDO and Hinode to compare sunspots/loops/AR with Solar Orbiter at different viewing angles/projection effects.

Ground-based observations did not have great seeing.https://www.sidc.be/EUI/data/movie/SOOPs/20231012_19-AR_Long_Term_SOOP/

Active Region. NOAA AR 13465 12.10.23-17.10.23 (noon).

NOAA AR 13470 17.10.23 (evening) - 20.10.23 00:00.

Small flare on 13th, caught during the EUI-HRI observation window at 9-10UT.

Paper by Nicolas Poirier currently under review

Very good run from Solar Orbiter point of view. The main objectives were fulfilled, unfortunate with the seeing conditions in the canary islands so not all co-observations were possible.

Hinode (EIS, XRT, SP) and DKIST.

Hinode data available, DKIST did not have good seeing and could only observe 1 of th 4 FOVs

Coordinated observations from Hinode and DKIST were requested and are available. Earth-based observations were necessary for the aim of the SOOP of obtaining co-observations of the pole from two vantage points while being both at the same latitude.

Main aims:

-17 October: observe the pole at the same latitude between SolO and Earth-based, only differing in longitude. Objective was fulfilled and co-observations at the same latitude of 5.7 degrees, with 51 degrees angle of separation, were obtained. This was the last time in the mission where SolO orbit would allow for co-latitude polar observations so no re-run of the SOOP with the same aim is expected.

-Co-observations with observatories from the Earth point of view to test stereoscopic studies of the weak polar magnetic field. Analysis is ongoing and will be a precursor for studies during the upcoming higher latitudinal orbits of SolO.

SPICE run dedicated observation programs for polar plumes and spectral atlas with full spectral coverage.

Special because co-latitude solo-earth @0.37 au.

Plume was caught at the limb on 17 Oct.

North Pole for polar observations on both instances of the SOOP.

-During the 17 October instance, co-latitude (5.7 degrees) for SolO and Earth with a separation angle of -51 degrees.

Polar faculae present.

During the 17 October instance, co-latitude between SolO and Earth.

Presentations: - “Stereoscopic polar observations”, COFFIES Workshop: Science of the poles (online), June 2024.

- “Polar stereoscopic analysis with Solar Orbiter”, XVI Reunión Científica de la Sociedad Española de Astronomía (SEA), July 2024.

Hinode, SST, IRIS, GREGOR

SST data in Halpha gives high spatio-temporal information on the chromosphere, which is missing in SO. Same for IRIS.

Hinode is providing higher spectral and spatial resolution data than SO and it can be used for stereoscopy. SDO/HMI can also be used for stereoscopy.

Caught nice sunspot seen from SOLO and Earth as intended. No issues with the pointing, nor for Hinode. Pointing had to be decided 4 days in advance with old LL.

Observation centered on AR13468 (alpha spot), leading spot in (-420'', -255'') at 5:30 UT as seen from Earth.

Separation angle between SO and Earth was ~-43 degrees and the mu angle of the sunspot was 0.92 as seen by SO and 0.86 as seen from Earth, so ideal for stereoscopy and co-observation.

Moat flow, MMFs, magnetic cancellation, pore emergence, coronal loops kink oscillations, magnetic reconnection

One paper submitted in mid-November 2024 by Nicolas Poirier (UIO) using data from this SOOP.

In LTP13 a preceding offpointing was commanded for SPICE to scan the west limb. Metis observed at least 3 CMEs incl prominence ejection during the soop. The CH boundary is stable, almost not affected. Prominence eruption around south pole in LYA (first time with Metis).

There was also EUI/HRIEUV movie associated with the Coronal Hole Bounday SOOP https://www.sidc.be/EUI/data/movie/SOOPs/20231020-CoronalHoleBoundary.mp4

Target was the full corona with particular focus on the regions at the interface between streamers and coronal holes.

disk-centre pointing + 3 scans of the West limb for HR observations by SPICE and EUI.

two small CMEs occurred on 21/10 from the SW and NE quadrants. The region observed off-limb with SPICE and EUI turned out to be a dark-halo surrounding an active region (probably associated with an equatorial pseudo-streamer).

Hinode/EIS was (mistakenly?) not pointed at the coronal hole for most of the 3-day observing campaign

SST

In RSW12, Sun-Earth line observationsallowed to better observe the coronal hole with SDO/AIA 193A channel. This helped with target selection for Orbiter and also in post-event analysis of the coronal hole. Hinode/EIS spectroscopic observations (although the targetting unfortunately was not always pointed at the coronal hole as we would have liked). IRIS and SST observations of coronal hole bright point.

2nd target was the best one, featuring equatorial CH and some bright points in FOV. Connectivity tool indeed linked the source of fast wind to the HRI FOV.

Coronal hole on disc emitting fast wind that is then measured by SolO

coronal hole, coronal hole bright points, filament channel, failed eruption

Presentation: SST observations by Sanja Danilovic https://espos.stream/2024/05/02/Danilovic/. Publications in early stages of preparation by Alex James and Stephanie Yardley on the successful Orbiter connectivity and the failed eruption observed with EUI/HRI to the north of the coronal hole.

Alignment SPICE-HRI was very accurate. SPICE slit offset was measured in precursor data and then raster adjusted through iVSTP, worked well.

Accuracy goal was achieved, and successful drift of the slit across the magnetic polarity.

and DKIST

Coordinated observations from Hinode and DKIST were requested and are available. Earth-based observations were necessary for the aim of the SOOP of obtaining co-observations of the pole from two vantage points while being both at the same latitude.

Main aims:

-Co-observations with observatories from the Earth point of view to test stereoscopic studies of the weak polar magnetic field. Analysis is ongoing and will be a precursor for studies during the upcoming higher latitudinal orbits of SolO.

SPICE run dedicated observation programs for polar plumes and spectral atlas with full spectral coverage.

Run at maximum SO latitude (8deg) @0.56 au.

North Pole for polar observations on both instances of the SOOP.

- During the 31 October instance the highest latitude (7.99 degrees) of this orbit was reached (-20.7 degrees separation angle between Earth and SolO).

Presentations:

- “Stereoscopic polar observations”, COFFIES Workshop: Science of the poles (online), June 2024.

- “Polar stereoscopic analysis with Solar Orbiter”, XVI Reunión Científica de la Sociedad Española de Astronomía (SEA), July 2024.

13 Nov with 22min dwells specific for SPICE to observe in many lines (allowing basic composition map). Metis could take part in the SPICE-specific run because of far distance.

Very successful first run for SPICE, but more work is needed on data processing.

Eruptions on 14th March are seenin both of Metis channels, and also captured by SoloHI.

2 M flares on the last day.

to find connection point with S/C, at Sun-Earth line crossing. Mosaic consisting of 12 pointings, ~4hrs dwell each -pVSTP

In parallel: instrument-specific cross-calibrations with Earth-bound observatories during Sun-Earth line crossing at 0.43 au (2023-03-20)

Limb scan with SPICE + HRI (3 pointings -> decided to be 2 pointings at SOOP Refinement Meeting) to scan the East limb where PSP will fly over (preferably southern hemisphere for WISPR - details TBC)

Metis specific observations during PSP-SO quadrature (moment of Quadrature: 2024-03-29T00:19 UT).

Very nice loop system seen by EUI/HRI as well as SPICe rasters.

PHI also acquired the data successfully

Target same at Major Flare SOOP.

PHI image stabilisation system didn’t lock for some reason

Successful, but Sun quiet.

HRI 5s cadence, disk center during the eclipse