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May 13, 2024
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Add sat cycle #6

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59c4519
Add sat cycle
emmanuelmathot Apr 15, 2024
86238d4
Remove .vscode/settings.json
emmanuelmathot Apr 16, 2024
c75b511
Add cycle field to sat extension
emmanuelmathot Apr 16, 2024
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3 changes: 3 additions & 0 deletions .vscode/settings.json
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@@ -0,0 +1,3 @@
{
"jira-plugin.workingProject": ""
}
19 changes: 13 additions & 6 deletions README.md
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Expand Up @@ -21,13 +21,14 @@ It will often be combined with other extensions that describe the actual data, s

## Item Properties

| Field Name | Type | Description |
| ------------------------------------- | ------- | ----------- |
| sat:platform_international_designator | string | The International Designator, also known as COSPAR ID, and NSSDCA ID |
| sat:orbit_state | string | The state of the orbit. Either `ascending` or `descending` for polar orbiting satellites, or `geostationary` for geosynchronous satellites |
| sat:absolute_orbit | integer | The absolute orbit number at the time of acquisition. |
| sat:relative_orbit | integer | The relative orbit number at the time of acquisition. |
| Field Name | Type | Description |
| ------------------------------------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| sat:platform_international_designator | string | The International Designator, also known as COSPAR ID, and NSSDCA ID |
| sat:orbit_state | string | The state of the orbit. Either `ascending` or `descending` for polar orbiting satellites, or `geostationary` for geosynchronous satellites |
| sat:absolute_orbit | integer | The absolute orbit number at the time of acquisition. |
| sat:relative_orbit | integer | The relative orbit number at the time of acquisition. |
| sat:anx_datetime | string | The [Ascending Node](https://en.wikipedia.org/wiki/Orbital_node) Crossing (ANX) time, in UTC. It is formatted according to [RFC 3339, section 5.6](https://tools.ietf.org/html/rfc3339#section-5.6). |
| sat:cycle | integer | The repeat cycle of the satellite. |

*At least one of the fields must be specified.*

Expand Down Expand Up @@ -66,6 +67,12 @@ reference. Used to quickly compute orbital parameters without having to download
fly a baseline between 2 satellite acquisition, to find the best candidate in the archive from a post-disaster event (e.g
earthquake) scene acquisition for a DInSAR processing.

#### sat:cycle

The repeat cycle of the satellite. The repeat cycle is the number of orbits required for the satellite to return to the same
position in its orbit. It is used to determine the relative orbit number. For instance, a satellite with a 16-day repeat cycle
will have 16 relative orbits.

## Contributing

All contributions are subject to the
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1 change: 1 addition & 0 deletions examples/example-sentinel1.json
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Expand Up @@ -54,6 +54,7 @@
"sat:absolute_orbit": 4892,
"sat:relative_orbit": 95,
"sat:anx_datetime": "2015-03-05T04:41:46.5788740Z",
"sat:cycle": 407,
"sar:instrument_mode": "IW",
"sar:polarizations": [
"VV",
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9 changes: 9 additions & 0 deletions json-schema/schema.json
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Expand Up @@ -46,6 +46,11 @@
"required": [
"sat:anx_datetime"
]
},
{
"required": [
"sat:cycle"
]
}
]
},
Expand Down Expand Up @@ -140,6 +145,10 @@
"sat:anx_datetime": {
"type": "string",
"format": "date-time"
},
"sat:cycle": {
"type": "integer",
"minimum": 1
}
},
"patternProperties": {
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