FengYun :Fengyun, abbreviated FY, are China's weather satellites. China has launched polar orbit and geosynchronous orbit meteorological satellites since 1988. FengYun/FY3B-MERSI :Medium Resolution Spectral Imager (MERSI). This instrument has 20 channels on FY-3A/B/C satellites. The MERSI channels are mainly located in visible (VIS) and near-IR (NIR) spectral regions while the Visible and Infrared Radiometer (VIRR) instrument has the important IR channels. |
| FengYun/FY3B-MERSI.CH06 | 4133.04 | 4134.70 | 4135.19 | 3960.00 | 4290.00 | 169.95 | 4316.05 | 7.57e-9 | FY-3B | MERSI | FY-3B MERSI Channel 06 Spectral Response | | FengYun/FY3B-MERSI.CH07 | 4450.55 | 4452.14 | 4453.89 | 4270.00 | 4609.26 | 192.41 | 4205.00 | 6.35e-9 | FY-3B | MERSI | FY-3B MERSI Channel 07 Spectral Response | | FengYun/FY3B-MERSI.CH01 | 4734.73 | 4742.07 | 4721.22 | 4360.02 | 5059.37 | 332.20 | 3954.23 | 5.32e-9 | FY-3B | MERSI | FY-3B MERSI Channel 01 Spectral Response | | FengYun/FY3B-MERSI.CH08 | 4920.72 | 4922.52 | 4922.94 | 4724.30 | 5130.69 | 227.20 | 3756.53 | 4.65e-9 | FY-3B | MERSI | FY-3B MERSI Channel 08 Spectral Response | | FengYun/FY3B-MERSI.CH09 | 5216.67 | 5218.29 | 5214.96 | 5018.83 | 5416.12 | 220.53 | 3787.51 | 4.18e-9 | FY-3B | MERSI | FY-3B MERSI Channel 09 Spectral Response | | FengYun/FY3B-MERSI.CH02 | 5491.17 | 5497.88 | 5484.68 | 5111.99 | 5868.37 | 442.88 | 3602.31 | 3.59e-9 | FY-3B | MERSI | FY-3B MERSI Channel 02 Spectral Response | | FengYun/FY3B-MERSI.CH10 | 5667.59 | 5669.07 | 5666.13 | 5450.00 | 5858.70 | 220.65 | 3499.21 | 3.27e-9 | FY-3B | MERSI | FY-3B MERSI Channel 10 Spectral Response | | FengYun/FY3B-MERSI.CH11 | 6486.17 | 6487.47 | 6481.24 | 6271.70 | 6709.43 | 221.52 | 2879.30 | 2.05e-9 | FY-3B | MERSI | FY-3B MERSI Channel 11 Spectral Response | | FengYun/FY3B-MERSI.CH03 | 6480.49 | 6487.64 | 6470.99 | 6110.42 | 6925.59 | 562.33 | 2959.82 | 2.12e-9 | FY-3B | MERSI | FY-3B MERSI Channel 03 Spectral Response | | FengYun/FY3B-MERSI.CH12 | 6870.85 | 6873.85 | 6867.95 | 6639.82 | 7734.30 | 218.11 | 2849.01 | 1.81e-9 | FY-3B | MERSI | FY-3B MERSI Channel 12 Spectral Response | | FengYun/FY3B-MERSI.CH13 | 7646.11 | 7647.51 | 7644.52 | 7385.88 | 7981.15 | 233.04 | 2519.51 | 1.29e-9 | FY-3B | MERSI | FY-3B MERSI Channel 13 Spectral Response | | FengYun/FY3B-MERSI.CH14 | 8626.24 | 8627.40 | 8625.95 | 8391.52 | 8869.15 | 231.93 | 2223.54 | 8.96e-10 | FY-3B | MERSI | FY-3B MERSI Channel 14 Spectral Response | | FengYun/FY3B-MERSI.CH04 | 8637.20 | 8642.33 | 8635.91 | 8262.63 | 9106.94 | 537.81 | 2241.51 | 9.01e-10 | FY-3B | MERSI | FY-3B MERSI Channel 04 Spectral Response | | FengYun/FY3B-MERSI.CH15 | 9046.04 | 9048.00 | 9045.73 | 8718.82 | 9292.92 | 236.96 | 2295.83 | 8.41e-10 | FY-3B | MERSI | FY-3B MERSI Channel 15 Spectral Response | | FengYun/FY3B-MERSI.CH16 | 9419.15 | 9421.79 | 9415.44 | 9111.53 | 9762.78 | 230.84 | 2276.83 | 7.7e-10 | FY-3B | MERSI | FY-3B MERSI Channel 16 Spectral Response | | FengYun/FY3B-MERSI.CH16 | Filter Description | Filter ID (?) : | FengYun/FY3B-MERSI.CH16 |
| Description (?) : | FY-3B MERSI Channel 16 Spectral Response |
| Phot.System (?) : | MERSI |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | ------ |
| Obs. Facility (?) : | FY-3B |
| Instrument (?) : | MERSI |
| Comments (?) : | ------ |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
9419.15 | ------- | (Angstrom) |
| λmean (?) : |
9421.79 | ------- | (Angstrom) |
| λcen (?) : |
9408.35 | ------- | (Angstrom) |
| λeff (?) : |
9415.44 | ------- | (Angstrom) |
| λpeak (?) : |
9400.00 | ------- | (Angstrom) |
| λpivot (?) : |
9419.15 | ------- | (Angstrom) |
| λphot (?) : |
9417.03 | ------- | (Angstrom) |
| λmin (?) : |
9111.53 | ------- | (Angstrom) |
| λmax (?) : |
9762.78 | ------- | (Angstrom) |
| Weff (?) : |
230.84 | ------- | (Angstrom) |
| FWHM (?) : |
217.83 | ------- | (Angstrom) |
| Af/AV (?) : |
0.474 | ------- | () |
| Fsun (?) : |
81.79 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
FengYun Spectral Response Functions Transmission components: Filter + CCD + Instrument | | Calibration properties
Vega System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
7.69964e-10 | (erg/cm2/s/A) |
| |
------- |
2276.83 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
FengYun/FY3B-MERSI.CH16/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
1.22791e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
FengYun/FY3B-MERSI.CH16/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
10737.10 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
FengYun/FY3B-MERSI.CH16/ST |
| |
|
Filter added: 2020-08-19 12:10:20
Last update: 2020-12-10 16:29:00 | | FengYun/FY3B-MERSI.CH17 | 9826.46 | 9831.72 | 9820.27 | 8978.88 | 11000.00 | 263.74 | 2195.85 | 6.83e-10 | FY-3B | MERSI | FY-3B MERSI Channel 17 Spectral Response | | FengYun/FY3B-MERSI.CH18 | 10282.29 | 10283.42 | 10281.21 | 10012.11 | 10532.96 | 232.58 | 2068.18 | 5.87e-10 | FY-3B | MERSI | FY-3B MERSI Channel 18 Spectral Response | | FengYun/FY3B-MERSI.CH19 | 16436.39 | 16440.94 | 16431.21 | 15776.23 | 17204.75 | 600.82 | 1005.84 | 1.12e-10 | FY-3B | MERSI | FY-3B MERSI Channel 19 Spectral Response | | FengYun/FY3B-MERSI.CH20 | 21242.57 | 21245.46 | 21236.90 | 20611.56 | 21771.19 | 563.06 | 670.91 | 4.46e-11 | FY-3B | MERSI | FY-3B MERSI Channel 20 Spectral Response |
|
| 
 ≡ filter transmission<p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Location.Value</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<br> Vg(λ) ≡ Vega spectrum.<p><u>More info:</u><p>Vega spectrum from calspec database.<ul><li><a href="https://ui.adsabs.harvard.edu/abs/2014PASP..126..711B/abstract" target="_blank">Bohlin, Gordon, & Tremblay (2014)</a>.<li><a href="https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec" target="_blank">STScI current calspec</a>.<li><a href="morefiles/vega.dat" target="_blank">Vega spectrum file</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl.effective</ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<p>Equivalent to the horizontal size of a rectangle with height equal to maximum transmission and with the same area that the one covered by the filter transmission curve.<p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:instr.bandwidth<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Bounds.Extent</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission (energy counter).<br> Vg(λ) ≡ Vega spectrum.<p><i>(T(λ) must be multiplied by λ for photon counting devices)</i><p>F<sub>0,ν</sub>(Jy) = (2.9979246)<sup>-1</sup> 10<sup>5</sup> * λ<sub>ref</sub><sup>2</sup> * F<sub>0,λ</sub>(erg/cm<sup>2</sup>/s/A)<p>In the case that filter owner specifies its own values, they will be the ones provided by the service when queried through the VO.<p><u>Property info:</u><ul><li><b>Unit</b>:Jy<li><b>UCD</b>:phot.flux.density<li><b>Utype</b>: <i>photdm:PhotCal.ZeroPoint.Flux.value</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission (energy counter).<br> Vg(λ) ≡ Vega spectrum.<p><i>(T(λ) must be multiplied by λ for photon counting devices)</i><p><u>Property info:</u><ul><li><b>Unit</b>:erg/cm2/s/A<li><b>Utype</b>: <i>PhotCal.ZeroPoint</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<p>f(λ) ≡ flux of the spectrum<p><u>Property info:</u><ul><li><b>Utype</b>: <i>photdm:PhotometricSystem.detectorType</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<p><img src=showgraph.php?what=lmean&val=9421.7917397241&id=FengYun/FY3B-MERSI.CH16><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Location.Value</i></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission (photon counter)<br> Vg(λ) ≡ Vega spectrum<p><img src=showgraph.php?what=leff&val=9415.442027535&id=FengYun/FY3B-MERSI.CH16><p><u>More info:</u><p>Vega spectrum from calspec database.<ul><li><a href="https://ui.adsabs.harvard.edu/abs/2014PASP..126..711B/abstract" target="_blank">Bohlin, Gordon, & Tremblay (2014)</a>.<li><a href="https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec" target="_blank">STScI current calspec</a>.<li><a href="morefiles/vega.dat" target="_blank">Vega spectrum file</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl.effective</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission<p><img src=showgraph.php?what=lpiv&val=9419.1466734194&id=FengYun/FY3B-MERSI.CH16><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission (photon counter)<br> Vg(λ) ≡ Vega spectrum<p><img src=showgraph.php?what=lphot&val=9417.0270665462&id=FengYun/FY3B-MERSI.CH16><p><u>More info:</u><p>Vega spectrum from calspec database.<ul><li><a href="https://ui.adsabs.harvard.edu/abs/2014PASP..126..711B/abstract" target="_blank">Bohlin, Gordon, & Tremblay (2014)</a>.<li><a href="https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec" target="_blank">STScI current calspec</a>.<li><a href="morefiles/vega.dat" target="_blank">Vega spectrum file</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission<p>Equivalent to the horizontal size of a rectangle with height equal to maximum transmission and with the same area that the one covered by the filter transmission curve.<p><img src=showgraph.php?what=weff&val=230.84332289379,9408.3456102014,1&id=FengYun/FY3B-MERSI.CH16><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:instr.bandwidth<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Bounds.Extent</i></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
![(?)](javascript:Tip('<b>A<sub>f</sub>/A<sub>V</sub></b><br><table cellpadding=20><td class=helptd>Ratio between extintion at λ<sub>ref</sub> and visual extintion. <p>Calculated by the service using the extinction law by <a href="http://adsabs.harvard.edu/abs/1999PASP..111...63F" target="_blank">Fitzpatrick (1999)</a> improved by <a href="http://adsabs.harvard.edu/abs/2005ApJ...619..931I" target="_blank">Indebetouw et al (2005)</a> in the infrared. <p><img src=images/extinctionlaw.png><p>You can download the corresponding <a href=\"getextlaw.php\" target=\"_blank\">data file</a> for the opacity k<sub>λ</sub>. The extinction at each wavelength is calculated as: A<sub>λ</sub> = A<sub>V</sub> * k<sub>λ</sub>/k<sub>V</sub>, where k<sub>λ</sub> is the opacity for a given λ and k<sub>V</sub>=211.4<p><p><u>Property info:</u><ul></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission (photon counter).<br> Sun(λ) ≡ Sun spectrum.<p><img src=images/sunspec.png><p><p><u>More info:</u><p>Sun spectrum from calspec database: sun_reference_stis_002 composed with sun_mod_001 for larger wavelengths.<ul><li><a href="https://ui.adsabs.harvard.edu/abs/2014PASP..126..711B/abstract" target="_blank">Bohlin, Gordon, & Tremblay (2014)</a>.<li><a href="https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec" target="_blank">STScI current calspec</a>.<li><a href="morefiles/sun.dat" target="_blank">Sun composed spectrum</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>Unit</b>:erg/cm2/s/A<li><b>UCD</b>:phot.flux.density</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission (photon counter).<br> Vg(λ) ≡ Vega spectrum.<p>F<sub>0,ν</sub>(Jy) = (2.9979246)<sup>-1</sup> 10<sup>5</sup> * λ<sub>ref</sub><sup>2</sup> * F<sub>0,λ</sub>(erg/cm<sup>2</sup>/s/A)<p>In the case that filter owner specifies its own values, they will be the ones provided by the service when queried through the VO.<p><u>VO PhotDM Utypes</u>: <br><i>PhotCal.MagnitudeSystem.type</i> -> VEGAmag <br><i>PhotCal.ZeroPoint.Flux.value</i> -> F<sub>0</sub><p><u>More info:</u><p>Vega spectrum from calspec database.<ul><li><a href="https://ui.adsabs.harvard.edu/abs/2014PASP..126..711B/abstract" target="_blank">Bohlin, Gordon, & Tremblay (2014)</a>.<li><a href="https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec" target="_blank">STScI current calspec</a>.<li><a href="morefiles/vega.dat" target="_blank">Vega spectrum file</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>UCD</b>:phot.flux.density<li><b>Utype</b>: <i>photdm:PhotCal.ZeroPoint.Flux.value</i></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
