Ryan Malloy
15a830dc40
6 custom types (tle, eci_position, geodetic, topocentric, observer, pass_event), 67 SQL functions, 2 operators (&&, <->), and a GiST operator class for altitude-band indexing. Wraps Bill Gray's sat_code for SGP4/SDP4 propagation with WGS-72 constants for propagation and WGS-84 for coordinate output. All 5 regression tests pass on PG 18.
84 lines
2.6 KiB
Plaintext
84 lines
2.6 KiB
Plaintext
-- Test GiST index and operators
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CREATE EXTENSION IF NOT EXISTS pg_orbit;
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NOTICE: extension "pg_orbit" already exists, skipping
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-- Create test table with mixed orbit types
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CREATE TABLE test_orbits (
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id serial,
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name text,
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tle tle
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);
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-- ISS (LEO, ~400km)
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INSERT INTO test_orbits (name, tle) VALUES ('ISS',
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'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025
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2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001');
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-- Hubble (LEO, ~540km)
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INSERT INTO test_orbits (name, tle) VALUES ('Hubble',
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'1 20580U 90037B 24001.50000000 .00000790 00000+0 39573-4 0 9992
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2 20580 28.4705 61.4398 0002797 317.3115 42.7577 15.09395228 00008');
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-- GPS IIR-M (MEO, ~20200km)
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INSERT INTO test_orbits (name, tle) VALUES ('GPS-IIR',
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'1 28874U 05038A 24001.50000000 .00000012 00000+0 00000+0 0 9993
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2 28874 55.4408 300.3467 0117034 51.6543 309.5420 2.00557079 00006');
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-- Create GiST index
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CREATE INDEX test_orbits_gist ON test_orbits USING gist (tle);
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-- Overlap: ISS && Hubble = false (different altitude bands: ~400km vs ~540km)
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SELECT a.name AS sat_a, b.name AS sat_b, a.tle && b.tle AS overlaps
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FROM test_orbits a, test_orbits b
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WHERE a.id < b.id
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ORDER BY a.name, b.name;
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sat_a | sat_b | overlaps
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--------+---------+----------
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Hubble | GPS-IIR | f
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ISS | GPS-IIR | f
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ISS | Hubble | f
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(3 rows)
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-- Altitude distance between different orbit regimes
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SELECT a.name AS sat_a, b.name AS sat_b,
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round((a.tle <-> b.tle)::numeric, 0) AS alt_dist_km
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FROM test_orbits a, test_orbits b
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WHERE a.id < b.id
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ORDER BY a.name, b.name;
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sat_a | sat_b | alt_dist_km
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--------+---------+-------------
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Hubble | GPS-IIR | 19332
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ISS | GPS-IIR | 19451
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ISS | Hubble | 115
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(3 rows)
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-- GiST index scan: find all LEO sats (overlap with ISS)
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SET enable_seqscan = off;
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SELECT name FROM test_orbits
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WHERE tle && (SELECT tle FROM test_orbits WHERE name = 'ISS')
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ORDER BY name;
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name
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------
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ISS
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(1 row)
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RESET enable_seqscan;
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-- Nearest-neighbor via GiST: order by altitude distance to ISS
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SET enable_seqscan = off;
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SELECT name, round((tle <-> (SELECT tle FROM test_orbits WHERE name = 'ISS'))::numeric, 0) AS dist
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FROM test_orbits
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WHERE name != 'ISS'
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ORDER BY tle <-> (SELECT tle FROM test_orbits WHERE name = 'ISS');
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name | dist
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---------+-------
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Hubble | 115
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GPS-IIR | 19451
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(2 rows)
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RESET enable_seqscan;
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-- Self-overlap is always true
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SELECT name, tle && tle AS self_overlap FROM test_orbits ORDER BY name;
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name | self_overlap
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---------+--------------
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GPS-IIR | t
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Hubble | t
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ISS | t
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(3 rows)
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-- Cleanup
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DROP TABLE test_orbits;
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