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Observation Details
Overview Where Groups: Mode, FOV, # spectra in map Data Links
2021-12-03 23:54:37-02:48:20 +1d
HOP 393
Cycle 24/25 equatorial transition
x,y:-23",-38"
Max FOV:319"x81"
Target:Bright Points
Nearby Events
6302A Continuum Intensity319"x81"2040 spectra
6302A Longitudinal Flux Density319"x81"2040 spectra
6302A Transverse Flux Density319"x81"2040 spectra
6302A Velocity 6301.5A319"x81"2040 spectra

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Level 2 Summary
Level 1 Monthly
Level 2 Monthly
SP Cubes 35 MB
SOTSP: HOP 393
2021-12-03T23:54:37 to 2021-12-04T02:48:20
Science Goal: Cycle 24/25 equatorial transition
Program: Normal 320"x82", 1 side, Q75
Target: Bright Points
xcen=-23 ycen=-38
Instrument: SOTSP
HOP/JOP: 393
Description: Small magnetic features and coronal bright points have been shown to indicate the bands of activity associated with the solar cycle. The precise location of these bands is important for predicting the timing of solar minimum and, more generally, the long-term variability of the Sun. The termination of equatorward-propogating activity bands at the solar equator has been identified as a key event of the solar cycle (McIntosh et al. 2014, McIntosh and Leamon 2017, McIntosh et al. 2019). Using the record of cycle 24 activity, Leamon et al. 2019 have predicted the cycle 24/25 terminator event to occur in May 2020, with +5 month/-1.5 month uncertainty. SDO observations of the previous cycle 23/24 terminator event showed a nearly step-function-like increase in coronal bright point density and emission in various SDO/AIA bandpasses in the high-latitude, new cycle bands when compared to the low-latitude, old cycle bands. The flux changes across the terminator event were found to increase in proportion to the temperature of formation of the radiation. We propose a new set of synoptic observations of the solar equator to complement the high-latitude observations of IHOP 336 ("Cycle 25 Bright Points") in order to capture the solar cycle 24/25 terminator event. Hinode SP measurements will give us high resolution vector field data, and IRIS will show the chromospheric spectral signature of the bright points, characteristics that are not available with SDO/AIA and HMI. As a complement to the IHOP 336 dataset, we aim to find comparative differences between the developing activity of the new solar cycle with the diminishing activity of the old solar cycle around the time of transition.

Small magnetic features and coronal bright points have been shown to indicate the bands of activity associated with the solar cycle. The precise location of these bands is important for predicting the timing of solar minimum and, more generally, the long-term variability of the Sun. The termination of equatorward-propogating activity bands at the solar equator has been identified as a key event of the solar cycle (McIntosh et al. 2014, McIntosh and Leamon 2017, McIntosh et al. 2019). Using the record of cycle 24 activity, Leamon et al. 2019 have predicted the cycle 24/25 terminator event to occur in May 2020, with +5 month/-1.5 month uncertainty. SDO observations of the previous cycle 23/24 terminator event showed a nearly step-function-like increase in coronal bright point density and emission in various SDO/AIA bandpasses in the high-latitude, new cycle bands when compared to the low-latitude, old cycle bands. The flux changes across the terminator event were found to increase in proportion to the temperature of formation of the radiation. We propose a new set of synoptic observations of the solar equator to complement the high-latitude observations of IHOP 336 ("Cycle 25 Bright Points") in order to capture the solar cycle 24/25 terminator event. Hinode SP measurements will give us high resolution vector field data, and IRIS will show the chromospheric spectral signature of the bright points, characteristics that are not available with SDO/AIA and HMI. As a complement to the IHOP 336 dataset, we aim to find comparative differences between the developing activity of the new solar cycle with the diminishing activity of the old solar cycle around the time of transition.

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Chief Observer
DeRosa
Related Links
Cites: HOP 393     
Timeline: gif use
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Datasets
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wavelength: 6302A Continuum Intensity cadence: 0 min fov: 319,81 images: 2040 JavaScript Landing Page
wavelength: 6302A Velocity 6301.5A cadence: 0 min fov: 319,81 images: 2040 JavaScript Landing Page
wavelength: 6302A Transverse Flux Density cadence: 0 min fov: 319,81 images: 2040 JavaScript Landing Page
wavelength: 6302A Longitudinal Flux Density cadence: 0 min fov: 319,81 images: 2040 JavaScript Landing Page
Time Series (SP Datacubes)