Observation

Observation Details

XRT: Backup Synoptics

2007-05-03T06:03:01 to 2007-05-03T06:03:47

Science Goal: Coordinated Campaign Observation with THEMIS - a. Filament/prominence study, b. Evolving 3D Magnetic Field in Active Regions

Program: AR_on_disk_2

Target: FS

xcen=0 ycen=0

Instrument: XRT

HOP/JOP: 0

Description: Tim File-OBS_DEC: Synoptics_Open+Al/mesh - Backup_period
Daily Note: AOCU_N\D_AUTO will be issued to return to N/D AUTO judgement mode. After this execution, we will see the periodic transitions between gyro-only control (for night period) and gyro-sunsensor control (for day period), because of margin in AOCS onboard N/D calculation. Note that pointing jump may occur at the transition from gyro-only control to gyro-sunsesor control. At the worst case, the magnitude of jumps may be 40 arcsec. andnbsp
XRT: Active region observations SOT: Active Region observations
Request to XRT HOP Number 0004: a. series of 512x512 images in several filters for the duration of the campaign (one week) b. obs of both active regions and plage areas, full resolution at moderate cadence, for comparison with THEMIS magnetic observations.
Other Instruments: a. TRACE, MDI, CDS and EIT
Scientific Objectives: a. Scientific Objectives: i) to study the magnetic topology of the filament in the region near the ""barbs"". ii) magnetic causes of filament
eruption, in particular to observe the background fields and the weak fields near fimaent feet, to determine whether the eruption is due to reconnectoin in the lower or upper atmsophere or whether it is a global loss of equilibrium. iii) relation between photospheric flows and prominence eruption, by determining the
short and long-term evolution of the rpominence in conjunction with measurements of local evolution of minor polarities. iv) prominence thermal structure, to determine basic physical properties of the prominence-to-corona transition region. b. Scientific Objectives i) to estimate the evolution, distribution and neutralization of electric currents in active regions. ii) to quantify the transition from force-free to non force-free regime as function of height. iii) to obtain a 3D map of the topology of photospheric flux concentrations vs. height into the upper chromosphere in order to provide the international NLFFF team with boundary conditions for field extrapolations.Daily Note: AOCU_N\D_AUTO will be issued to return to N/D AUTO judgement mode. After this execution, we will see the periodic transitions between gyro-only control (for night period) and gyro-sunsensor control (for day period), because of margin in AOCS onboard N/D calculation. Note that pointing jump may occur at the transition from gyro-only control to gyro-sunsesor control. At the worst case, the magnitude of jumps may be 40 arcsec. andnbsp
XRT: Active region observations SOT: Active Region observations
Request to XRT HOP Number 0004: a. series of 512x512 images in several filters for the duration of the campaign (one week) b. obs of both active regions and plage areas, full resolution at moderate cadence, for comparison with THEMIS magnetic observations.
Other Instruments: a. TRACE, MDI, CDS and EIT
Scientific Objectives: a. Scientific Objectives: i) to study the magnetic topology of the filament in the region near the ""barbs"". ii) magnetic causes of filament
eruption, in particular to observe the background fields and the weak fields near fimaent feet, to determine whether the eruption is due to reconnectoin in the lower or upper atmsophere or whether it is a global loss of equilibrium. iii) relation between photospheric flows and prominence eruption, by determining the
short and long-term evolution of the rpominence in conjunction with measurements of local evolution of minor polarities. iv) prominence thermal structure, to determine basic physical properties of the prominence-to-corona transition region. b. Scientific Objectives i) to estimate the evolution, distribution and neutralization of electric currents in active regions. ii) to quantify the transition from force-free to non force-free regime as function of height. iii) to obtain a 3D map of the topology of photospheric flux concentrations vs. height into the upper chromosphere in order to provide the international NLFFF team with boundary conditions for field extrapolations.Daily Note: AOCU_N\D_AUTO will be issued to return to N/D AUTO judgement mode. After this execution, we will see the periodic transitions between gyro-only control (for night period) and gyro-sunsensor control (for day period), because of margin in AOCS onboard N/D calculation. Note that pointing jump may occur at the transition from gyro-only control to gyro-sunsesor control. At the worst case, the magnitude of jumps may be 40 arcsec. andnbsp
XRT: Active region observations SOT: Active Region observations
Request to XRT HOP Number 0004: a. series of 512x512 images in several filters for the duration of the campaign (one week) b. obs of both active regions and plage areas, full resolution at moderate cadence, for comparison with THEMIS magnetic observations.
Other Instruments: a. TRACE, MDI, CDS and EIT
Scientific Objectives: a. Scientific Objectives: i) to study the magnetic topology of the filament in the region near the ""barbs"". ii) magnetic causes of filament
eruption, in particular to observe the background fields and the weak fields near fimaent feet, to determine whether the eruption is due to reconnectoin in the lower or upper atmsophere or whether it is a global loss of equilibrium. iii) relation between photospheric flows and prominence eruption, by determining the
short and long-term evolution of the rpominence in conjunction with measurements of local evolution of minor polarities. iv) prominence thermal structure, to determine basic physical properties of the prominence-to-corona transition region. b. Scientific Objectives i) to estimate the evolution, distribution and neutralization of electric currents in active regions. ii) to quantify the transition from force-free to non force-free regime as function of height. iii) to obtain a 3D map of the topology of photospheric flux concentrations vs. height into the upper chromosphere in order to provide the international NLFFF team with boundary conditions for field extrapolations.

Annotations:

Chief Observer

REEVES, K., SAVAGE, S.