XRT: Active region tracking across disk
2007-05-10T10:18:24 to 2007-05-10T18:00:54
Science Goal: CDS/UVCS + Ulysses Campaign
Program: AR_near_W_limb_1
Target: AR
xcen=-925 ycen=-100
Instrument: XRT
HOP/JOP: 0
Description:
Tim File-OBS_DEC: MHD Waves-Al/Mesh(thick-Al)-20s cadence-Ti/poly context - 384x384 - AEC1
Daily Note: Run alignment program today. Make offset 930"" (conservative due to night drift). AOCS orbit element update needed to account for safehold-mode HW-timer bug. XRT to recover from reset error. SOT: Quiet Sun obs: McIntosh TRACE coordination at disk center. XRT: STEREO campaign
SOHO/UCVS-Ulysses campaign EIS: 1) UVCS-Ulysses campaign: Abundances as function of height in AR. EIS is requested to observe AR at the limb for a min of 4 hr 15 min per day on five days spanning west limb passage [7th May to disappearance of AR] 2) STEREO campaign. EIS will raster the slit across the active region on the disc and at the limb. (STEREO/SECCHI will complement with 75-second cadence 171 filtergrams, with other three wavelengths at 5-minute cadence.) [4th to 8th May] 3) Coronal dimming study. EIS will run coronal_wave_study to look for evidence of dimming following large events if activity looks likely. [As long as AR is visible] 4) After disappearance of the AR, EIS would like quiet Sun pointing near limb for: a) line broadening and diagnostics above limb b) STEREO campaign 304 high-cadence co-observations of spicules c) UVCS campaign If co-alignment program (2hr for N-limb, 2hr for E-limb) was not included in the May 5-7 weekend plan, please run this program soon after disappearance of the AR. andnbsp
This run will be important for calibrating absolute heliocentric coordinate for quiet sun. Also, this program may run once every a few days, depending on the satellite temperatures and science programs.
Request to XRT HOP Number 0007:
Other Instruments: SoHO/CDS, UVCS
SoHO keyhole starts 17-May (26m dish) and 21-May (34m dish) STEREO/SECCHI Ulysses will be ending the quadrature with SOHO. Ulysses will be at a latitude of 55 deg (south-west), in the plane of the sky. Hence any active region say between 45 and 65 degree south that might be near the limb would contribute to the solar wind measured in-situ by Ulysses. Scintillation measurement (G. Poletto)
Scientific Objectives: The main aim is to measure chemical abundances in active regions as a function of height for 1.0 andlt
R(Sun) andlt
1.6 using SOHO/CDS, Hinode/EIS, SOHO/UVCS, and to link them with in-situ measurements by Ulysses. A secondary aim is to measure electron temperatures, densities, and ionization state of the plasma as function of height from 1.0 to 1.6 solar radii using SOHO/CDS and Hinode/EIS. There have been no previous spectroscopic observations in the range 1.2 and
#8211
1.6 R(Sun).Daily Note: Run alignment program today. Make offset 930"" (conservative due to night drift). AOCS orbit element update needed to account for safehold-mode HW-timer bug. XRT to recover from reset error. SOT: Quiet Sun obs: McIntosh TRACE coordination at disk center. XRT: STEREO campaign
SOHO/UCVS-Ulysses campaign EIS: 1) UVCS-Ulysses campaign: Abundances as function of height in AR. EIS is requested to observe AR at the limb for a min of 4 hr 15 min per day on five days spanning west limb passage [7th May to disappearance of AR] 2) STEREO campaign. EIS will raster the slit across the active region on the disc and at the limb. (STEREO/SECCHI will complement with 75-second cadence 171 filtergrams, with other three wavelengths at 5-minute cadence.) [4th to 8th May] 3) Coronal dimming study. EIS will run coronal_wave_study to look for evidence of dimming following large events if activity looks likely. [As long as AR is visible] 4) After disappearance of the AR, EIS would like quiet Sun pointing near limb for: a) line broadening and diagnostics above limb b) STEREO campaign 304 high-cadence co-observations of spicules c) UVCS campaign If co-alignment program (2hr for N-limb, 2hr for E-limb) was not included in the May 5-7 weekend plan, please run this program soon after disappearance of the AR. andnbsp
This run will be important for calibrating absolute heliocentric coordinate for quiet sun. Also, this program may run once every a few days, depending on the satellite temperatures and science programs.
Request to XRT HOP Number 0007:
Other Instruments: SoHO/CDS, UVCS
SoHO keyhole starts 17-May (26m dish) and 21-May (34m dish) STEREO/SECCHI Ulysses will be ending the quadrature with SOHO. Ulysses will be at a latitude of 55 deg (south-west), in the plane of the sky. Hence any active region say between 45 and 65 degree south that might be near the limb would contribute to the solar wind measured in-situ by Ulysses. Scintillation measurement (G. Poletto)
Scientific Objectives: The main aim is to measure chemical abundances in active regions as a function of height for 1.0 andlt
R(Sun) andlt
1.6 using SOHO/CDS, Hinode/EIS, SOHO/UVCS, and to link them with in-situ measurements by Ulysses. A secondary aim is to measure electron temperatures, densities, and ionization state of the plasma as function of height from 1.0 to 1.6 solar radii using SOHO/CDS and Hinode/EIS. There have been no previous spectroscopic observations in the range 1.2 and
#8211
1.6 R(Sun).
