HOP list   Monthly Events

HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0064

WHI One-Week Campaign #1: Linking the Corona to the Solar Wind at Ulysses (to occur at the NE limb of the Sun)

plan term


@ @


 name : Poletto @  e-mail : poletto[at]arcetri.astro.it

contact person in HINODE team

 name : Sterling @  e-mail : alphonse.sterling[at]nasa.gov

 abstract of observational proposal
Our main scientific objective is to derive the solar wind speed profile from coordinated SOHO/UVCS and radio scintillation data, over a wide range of heliocentric distances (2 to 50 R_sun), with the terminal wind speed being given by in situ Ulysses data. The goal of this study is twofold: on one side, we will provide the solar community with a composite wind speed vs. heliocentric distance profile based on measurements which refer to the same plasma parcels measured by different experiments at different distances - thanks to the SOHO-Sun-Ulysses quadrature configuration. While this is "per se" a valid objective, the wind profile we will come up to will serve as a benchmark input for the construction of a reference solar minimum heliosphere, as described later in this document.

A further objective we aim to as a by-product of the campaign observations is to get a better understanding of polar plumes morphology and physical conditions, with special emphasis to their temporal variation, practically unknown so far. The role of plumes in solar wind is still to be ascertained, hence, although we will build a wind profile averaged over the plume/interplume plasma in our main objective, we also plan to contribute to a better understanding of the solar wind by investigating polar plumes. Observations from COMP will provide measurements of alfvenic plasma motions and pos magnetic field diagnostics from the limb to 1.4 solar radii in the 10747 and 10830 lines. These measurements will help characterize the magnetic structures present, their inclination and the multitude of wave motions present - essential to understanding the roots of the fast solar wind.

 request to SOT
Hinode/SOT -- campaign contact: Scott McIntosh
SP: detailed vector spectropolarimetry of the polar region:
- 400"X100" spectropolarimetric maps of polar region in Fe I 6301/6302
 NFI: two sequences to characterize the photospheric magnetic field and
 lower chromospheric expansion.
- Fe I 6302.5 Ang. photospheric magnetograms at 10-20s cadence.
- Na I 5890.6 Ang. chromospheric magnetograms at 10-20s cadence.

 request to XRT
Hinode/XRT -- campaign contact: Taro Sakao, Alphonse Sterling.
Filters: Al/poly, Ti/Poly filters appear adequate to image soft X-ray
plume plasma. Occasionally thin/Be images may be taken to check on the
presence of hotter material, possibly with longer exposures (~50 s).

 request to EIS
Hinode/EIS -- campaign contacts: David Williams, Alphonse Sterling
Plan TBD:

 other participating instruments
Various.  See WHI main webpage.

Further Details:
More details can be found at the following page:
(especially under "targeted observing plans").

Observation Time Period: Nominally 1600 - 2000 UT, and/or 2000 - 2400 UT (one of these two blocks can be given up for a WHI ToO if appropriate).  Check main campaign page for possible updates.

Instrument-Pointing Considerations: The geometry of the Ulysses quadrature dictates where data need to be acquired: east limb, Northern hemisphere, 70 degree latitude.

HOP list   Monthly Events