Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk
For over 400 years, sunspot observation has been consistently collected and it has become the longest-running experiment and still ongoing scientific project. Sunspot numbers are manually counted based on direct visual observation or drawing it through the projection method. Langkawi National Obser...
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| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Online Access: | http://eprints.usm.my/44246/ http://eprints.usm.my/44246/1/FARAHANA%20KAMARUDIN.pdf |
| _version_ | 1848880009985392640 |
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| author | Kamarudin, Farahana |
| author_facet | Kamarudin, Farahana |
| author_sort | Kamarudin, Farahana |
| building | USM Institutional Repository |
| collection | Online Access |
| description | For over 400 years, sunspot observation has been consistently collected and it has become the longest-running experiment and still ongoing scientific project.
Sunspot numbers are manually counted based on direct visual observation or drawing it through the projection method. Langkawi National Observatory (LNO) has carried
out consistent sunspot observation since 2008. LNO is equipped with CCDs and capable of recording sunspot in the form of digital images. From these images, the numbers of sunspots are manually counted by observers to get LNO’s daily RSN. Bias from different observers and weather factor like haze or thin cloud cover leads to inconsistency due to different individual visual characteristics. |
| first_indexed | 2025-11-15T17:56:19Z |
| format | Thesis |
| id | usm-44246 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T17:56:19Z |
| publishDate | 2018 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-442462019-05-03T07:24:04Z http://eprints.usm.my/44246/ Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk Kamarudin, Farahana QC1 Physics (General) For over 400 years, sunspot observation has been consistently collected and it has become the longest-running experiment and still ongoing scientific project. Sunspot numbers are manually counted based on direct visual observation or drawing it through the projection method. Langkawi National Observatory (LNO) has carried out consistent sunspot observation since 2008. LNO is equipped with CCDs and capable of recording sunspot in the form of digital images. From these images, the numbers of sunspots are manually counted by observers to get LNO’s daily RSN. Bias from different observers and weather factor like haze or thin cloud cover leads to inconsistency due to different individual visual characteristics. 2018-03 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/44246/1/FARAHANA%20KAMARUDIN.pdf Kamarudin, Farahana (2018) Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk. Masters thesis, Universiti Sains Malaysia. |
| spellingShingle | QC1 Physics (General) Kamarudin, Farahana Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk |
| title | Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk |
| title_full | Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk |
| title_fullStr | Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk |
| title_full_unstemmed | Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk |
| title_short | Digital Sunspot Counting For Langkawi National Observatory In White Light Full Disk |
| title_sort | digital sunspot counting for langkawi national observatory in white light full disk |
| topic | QC1 Physics (General) |
| url | http://eprints.usm.my/44246/ http://eprints.usm.my/44246/1/FARAHANA%20KAMARUDIN.pdf |