ACROSS supports a layered approach to metadata. Observatories have Telescopes which have Instruments.
See documentation for more details.
Observatory Metadata
[BlackCAT] BlackCAT CubeSat
4d88443a-ffd7-4d19-bfb7-24da34c16408
observatory type: SPACE_BASED
url: https://heasarc.gsfc.nasa.gov/docs/blackcat/
Observatory Ephemeris Types
{
"ephemeris_type": "tle",
"priority": 1,
"parameters": {
"norad_id": 67369,
"norad_satellite_name": "BLACKCAT"
}
}Telescopes (1)
[BlackCAT] BlackCAT CubeSat
b73421e2-8b39-40cb-911d-7d93d3aa92fb
[BlackCAT] BlackCAT CubeSat
b73421e2-8b39-40cb-911d-7d93d3aa92fb
Instruments (1)
[BlackCAT] BlackCAT
14b5acc2-02ab-4499-b8d3-0b3b5aca1553
[BlackCAT] BlackCAT
14b5acc2-02ab-4499-b8d3-0b3b5aca1553
Filters (1)
id: b93fbbe3-59aa-4104-bf50-52828846ae67
created_on: 2026-08-18T16:37:55.787037
name: BLACKCAT BANDPASS
peak_wavelength: null
min_wavelength: 1.549802480415003 Å
max_wavelength: 6.199209921660012 Å
is_operational: true
sensitivity_depth_unit: null
sensitivity_depth: null
sensitivity_time_seconds: null
instrument_id: 14b5acc2-02ab-4499-b8d3-0b3b5aca1553
Footprint
[
[
{
"x": -20,
"y": -35
},
{
"x": 20,
"y": -35
},
{
"x": 20,
"y": 35
},
{
"x": -20,
"y": 35
},
{
"x": -20,
"y": -35
}
]
] Constraints (3)
{
"short_name": "Sun",
"name": "Sun Angle",
"min_angle": 120,
"max_angle": null
} {
"short_name": "Earth",
"name": "Earth Limb",
"min_angle": 20,
"max_angle": null
} {
"short_name": "Moon",
"name": "Moon Angle",
"min_angle": 20,
"max_angle": null
}