{
  "id": 241475,
  "title": "Interval between successive observations",
  "url": "/competitions/seti-breakthrough-listen/discussion/241475",
  "author_name": "Manav",
  "post_date": "2021-05-24T17:35:30.319000",
  "votes": 9,
  "comment_count": 2,
  "views": 0,
  "content": "<p>Hi Organizers/fellow Kagglers,</p>\n<p>According to the data description:-<br>\n<code>One method we use to isolate candidate techno signatures from RFI is to look for signals that appear to be coming from particular positions on the sky. Typically we do this by alternating observations of our primary target star with observations of three nearby stars: 5 minutes on star “A”, then 5 minutes on star “B”, then back to star “A” for 5 minutes, then “C”, then back to “A”, then finishing with 5 minutes on star “D”. One set of six observations (ABACAD) is referred to as a “cadence”. Since we’re just giving you a small range of frequencies for each cadence, we refer to the datasets you’ll be analyzing as “cadence snippets”.</code></p>\n<p>My question here is:-<br>\n<strong>Are observation AB, AC and AD taken back to back immediately or there are any difference in time/other boundary conditions of the experiment?</strong></p>\n<p>Why am I asking this?:-<br>\nI am planning to do some feature engineering which is sensitive to the boundary conditions. So I want to know if I can treat the whole pair of ON and OFF as a whole or I need to do it at a more granular level between each sub-pair.</p>\n<p>Any help/elaboration would be really helpful.</p>\n<p>Thanks 😊</p>",
  "messages": [
    {
      "id": 1321457,
      "postDate": "2021-05-24T17:35:30.320Z",
      "content": "<p>Hi Organizers/fellow Kagglers,</p>\n<p>According to the data description:-<br>\n<code>One method we use to isolate candidate techno signatures from RFI is to look for signals that appear to be coming from particular positions on the sky. Typically we do this by alternating observations of our primary target star with observations of three nearby stars: 5 minutes on star “A”, then 5 minutes on star “B”, then back to star “A” for 5 minutes, then “C”, then back to “A”, then finishing with 5 minutes on star “D”. One set of six observations (ABACAD) is referred to as a “cadence”. Since we’re just giving you a small range of frequencies for each cadence, we refer to the datasets you’ll be analyzing as “cadence snippets”.</code></p>\n<p>My question here is:-<br>\n<strong>Are observation AB, AC and AD taken back to back immediately or there are any difference in time/other boundary conditions of the experiment?</strong></p>\n<p>Why am I asking this?:-<br>\nI am planning to do some feature engineering which is sensitive to the boundary conditions. So I want to know if I can treat the whole pair of ON and OFF as a whole or I need to do it at a more granular level between each sub-pair.</p>\n<p>Any help/elaboration would be really helpful.</p>\n<p>Thanks 😊</p>",
      "rawMarkdown": "Hi Organizers/fellow Kagglers,\n\nAccording to the data description:-\n`One method we use to isolate candidate techno signatures from RFI is to look for signals that appear to be coming from particular positions on the sky. Typically we do this by alternating observations of our primary target star with observations of three nearby stars: 5 minutes on star “A”, then 5 minutes on star “B”, then back to star “A” for 5 minutes, then “C”, then back to “A”, then finishing with 5 minutes on star “D”. One set of six observations (ABACAD) is referred to as a “cadence”. Since we’re just giving you a small range of frequencies for each cadence, we refer to the datasets you’ll be analyzing as “cadence snippets”.`\n\nMy question here is:-\n**Are observation AB, AC and AD taken back to back immediately or there are any difference in time/other boundary conditions of the experiment?**\n\nWhy am I asking this?:-\nI am planning to do some feature engineering which is sensitive to the boundary conditions. So I want to know if I can treat the whole pair of ON and OFF as a whole or I need to do it at a more granular level between each sub-pair.\n\nAny help/elaboration would be really helpful.\n\nThanks 😊",
      "votes": 9
    },
    {
      "id": 1321714,
      "postDate": "2021-05-24T22:14:24.987Z",
      "content": "<p>It takes a short time for the telescope to slew and settle between pointings - maybe 20 seconds. Aside from that the ABACAD cadence is continuous. </p>",
      "rawMarkdown": "It takes a short time for the telescope to slew and settle between pointings - maybe 20 seconds. Aside from that the ABACAD cadence is continuous. ",
      "votes": 7,
      "replies": [
        {
          "id": 1322137,
          "postDate": "2021-05-25T08:08:01.180Z",
          "content": "<p>Thanks for the clarification <a href=\"https://www.kaggle.com/stevecroft\" target=\"_blank\">@stevecroft</a><br>\nThat helps a lot 😊</p>",
          "rawMarkdown": "Thanks for the clarification @stevecroft\nThat helps a lot 😊",
          "votes": 1
        }
      ]
    }
  ],
  "comments": [
    {
      "id": 1321714,
      "author_name": "Steve Croft",
      "author_url": "",
      "post_date": "2021-05-24T22:14:24.987000",
      "content": "<p>It takes a short time for the telescope to slew and settle between pointings - maybe 20 seconds. Aside from that the ABACAD cadence is continuous. </p>",
      "votes": 7,
      "replies": [
        {
          "id": 1322137,
          "author_name": "Manav",
          "author_url": "",
          "post_date": "2021-05-25T08:08:01.180000",
          "content": "<p>Thanks for the clarification <a href=\"https://www.kaggle.com/stevecroft\" target=\"_blank\">@stevecroft</a><br>\nThat helps a lot 😊</p>",
          "votes": 1,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "1321457": "Hi Organizers/fellow Kagglers,\n\nAccording to the data description:-\n`One method we use to isolate candidate techno signatures from RFI is to look for signals that appear to be coming from particular positions on the sky. Typically we do this by alternating observations of our primary target star with observations of three nearby stars: 5 minutes on star “A”, then 5 minutes on star “B”, then back to star “A” for 5 minutes, then “C”, then back to “A”, then finishing with 5 minutes on star “D”. One set of six observations (ABACAD) is referred to as a “cadence”. Since we’re just giving you a small range of frequencies for each cadence, we refer to the datasets you’ll be analyzing as “cadence snippets”.`\n\nMy question here is:-\n**Are observation AB, AC and AD taken back to back immediately or there are any difference in time/other boundary conditions of the experiment?**\n\nWhy am I asking this?:-\nI am planning to do some feature engineering which is sensitive to the boundary conditions. So I want to know if I can treat the whole pair of ON and OFF as a whole or I need to do it at a more granular level between each sub-pair.\n\nAny help/elaboration would be really helpful.\n\nThanks 😊",
    "1321714": "It takes a short time for the telescope to slew and settle between pointings - maybe 20 seconds. Aside from that the ABACAD cadence is continuous. "
  }
}