“SpecobjID”的版本间差异

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（以“*DR7 Bits Length (# of bits) Mask Assignment Description 0-15 16 0xFFFF000000000000 plate number of spectroscopic plate 16-31 16 0x0000FFFF00000000 ...”为内容创建页面）
 
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（未显示同一用户的4个中间版本）
第1行： 第1行：
*DR7
*DR7 and before
Bits Length
:Bits Length (# of bits) Mask Assignment Description
:0-15 16 0xFFFF000000000000 plate number of spectroscopic plate
(# of bits) Mask Assignment Description 0-15 16 0xFFFF000000000000 plate number of spectroscopic plate 16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed 32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640) 42-47 6 0x00000000003F0000 type type of targeted object 48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift)
:16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed
:32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640)
:42-47 6 0x00000000003F0000 type type of targeted object
:48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift)


*DR8 and after
:50-63 plate id number (14 bits)
:38-49 fiber id number (12 bits)
:24-37 MJD (date) plate was observed minus 50000 (14 bits)
:10-23 rerun (14 bits)
:0-9 line/redshift/index: 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) (10 bits)
:SpecobjID和plate,mjd,fiberID的互转参考[[sdssidl][中的程序[http://202.127.29.3/~shen/wiki/index.php/Sdssidl#SDSS.E4.B8.AD.E7.9A.84.E5.9F.BA.E7.A1.80.E7.A8.8B.E5.BA.8F]

2015年6月25日 (四) 04:24的最新版本

  • DR7 and before
Bits Length (# of bits) Mask Assignment Description
0-15 16 0xFFFF000000000000 plate number of spectroscopic plate
16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed
32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640)
42-47 6 0x00000000003F0000 type type of targeted object
48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift)


  • DR8 and after
50-63 plate id number (14 bits)
38-49 fiber id number (12 bits)
24-37 MJD (date) plate was observed minus 50000 (14 bits)
10-23 rerun (14 bits)
0-9 line/redshift/index: 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) (10 bits)
SpecobjID和plate,mjd,fiberID的互转参考[[sdssidl][中的程序[1]
取自“http://202.127.29.3/~shen/wiki/index.php?title=SpecobjID&oldid=1811”