SETI@home
De-chirping Data

¤£¥Î»¡±z¤]ª¾¹D¡A¥~¬P¤Hªº¬P²y¬Û¹ï©ó§Ú­Ìªº¦a²y¤£¤Ó¥i¯à¬OÀR¤î¤£°Êªº¡C ±zÀ³¸ÓÁÙ°O±o§Ú­Ì°£¤F¦ÛÂध¥~¡AÁÙ¶µÛ¤Ó¶§¤½Âà§a¡]ÁÙ¦³ªü¹p¦è§B±æ»·Ãè¤]¬O¡^¡I ¦Ó¾ã­Ó¤Ó¶§¨t¤S¶µÛ»Èªe¨t±ÛÂà...µ¥¡C©Ò¥H§Ú­Ì¥i¥H±À´ú§Ú­Ìªº¥~¬PªB¤ÍÀ³¸Ó¤]¦³Ãþ¦üªº±¡ªp¡C

¥Ñ²¾°Êª«Åé©Òµo¥Xªº°T¸¹¡A©Î³Q²¾°Êª«Åé©Ò±µ¦¬ªº°T¸¹³£¦³¤@­Óª«²z²{¶HºÙ°µ¡u³£¤R°Ç®ÄÀ³¡]the Doppler effect¡^¡v¡C ¨Ò¡G·í¤@³¡¨®¤lÅTµÛ³â¥z±q§A¨­Ãä¸g¹Lªº®É­Ô¡A§A·|µo²{³â¥zªºÁn½Õ¨Ã¤£¬O©T©wªº¡A·í¨®¤l±q»·³B²¾°Ê¹L¨Ó®É¡AÁn­µ¤£Â_¦a¦b§ïÅÜ¡C

ÁöµM§Ú­Ì»·¤èªºªB¤Í¤£¬O¹ïµÛ§Ú­Ì«ö³â¥z¡A¦Ó¬O¹ï§Ú­Ì¶Ç°e¹qªi¡]¹qºÏªi¡@electromagnetic waves¡^¡A ¤£¹L¹qºÏªi»P­è­è´£¨ìªºÁnªi¤@¼Ë·|²£¥Í³£´¶°Ç®ÄÀ³¡A·í§Ú­Ì»P¹ï¤èªº¨â­Ó¬P¨t¶¡¦³¬Û¹ïªº³t«×®É¡A©Ò²£¥Íªº³£´¶°Ç®ÄÀ³·|¹³¤W­zªº¨Ò¤l¤@¼Ë¡A§á¦±¤F­ì©lªº°T¸¹¡C ³oºØ¡uÅܽա]chirped¡^¡vªº°T¸¹·|ÀHµÛ®É¶¡§ïÅܨäÀW²v¡A´N¹³¥k°¼ªº¹Ï¥Ü¤@¼Ë¡C¬°¤F±±¨î³oºØÅܽաA SETI@home ¿Ã¹õ«OÅ@µ{¦¡±N·|¹Á¸Õ¥H³\¦hºØ¥i¯àªº³£´¶°Ç¥[³t­È¡]doppler accelerations¡^¨Ó¤ÀªR­ì©l¸ê®Æ¡C ­º¥ý¡A¿Ã¹õ«OÅ@µ{¦¡¥H¤@¨Ç¼Æ¾Ç¼Ò¦¡¡A¹Á¸Õ´_­ì³£´¶°Ç¥[³t©Ò³y¦¨ªº¼vÅT©ÎºÙ°µ"chirp"¡C ±µµÛ¡A¤~±N¥¼¥[³t«eªº¸ê®Æ°e¥h°µFFT¡]§Ö³t´I§Q¸­Âà´«¡^¹Bºâ¡A³o¼Ëªº¾ã­Ó¨BÆJ´NºÙ¬°"De-chirping"¡C SETI@home·|¦b-50 Hz/sec ¨ì +50 Hz/sec¶¡¹Á¸Õ³\¦hºØ¤£¦Pªº¥[³t­È ¡A¦b³Ì²Ó·Lªº 0.075 Hz ÀW²v¸ÑªR«×ªº±¡ªp¤U¡ASETI@home µ{¦¡·|¹Á¸Õ¥H¤¶©ó -5 Hz/sec ¨ì +5Hz/sec ªº 5409 ºØ¤£¦P¼Æ­È¡A¨ÓÀˬd³oµ§¸ê®Æ¡I

 
¦^¨ì SETI@home ­º­¶
Copyright ©2001 SETI@home


    ¥»­¶Ä¶ªÌ¬°¡GSFK
¦p±ýÂà¸ü½Ð¨Ó«H§iª¾¡AÁÂÁ¡C
setitaiwan@yahoo.com
¥»­¶­ì¤åºô§}¡G http://setiathome.ssl.berkeley.edu/reference/chirping.html