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.
117 lines
3.7 KiB
Plaintext
117 lines
3.7 KiB
Plaintext
-- Test TLE type: parsing, round-trip, accessors
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CREATE EXTENSION IF NOT EXISTS pg_orbit;
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-- Parse a valid ISS TLE
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SELECT '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'::tle IS NOT NULL AS parse_ok;
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parse_ok
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----------
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t
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(1 row)
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-- Accessor functions
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WITH iss AS (
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SELECT '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'::tle AS t
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)
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SELECT
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tle_norad_id(t) AS norad_id,
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round(tle_inclination(t)::numeric, 4) AS inc_deg,
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round(tle_eccentricity(t)::numeric, 7) AS ecc,
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round(tle_mean_motion(t)::numeric, 8) AS mm_rev_day,
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round(tle_period(t)::numeric, 2) AS period_min,
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round(tle_perigee(t)::numeric, 1) AS perigee_km,
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round(tle_apogee(t)::numeric, 1) AS apogee_km,
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tle_intl_desig(t) AS cospar
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FROM iss;
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norad_id | inc_deg | ecc | mm_rev_day | period_min | perigee_km | apogee_km | cospar
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----------+---------+-----------+-------------+------------+------------+-----------+----------
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25544 | 51.6400 | 0.0006703 | 15.50100486 | 92.90 | 411.9 | 421.0 | 98067A
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(1 row)
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-- Observer type parsing
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SELECT '40.0N 105.3W 1655m'::observer IS NOT NULL AS observer_ok;
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observer_ok
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-------------
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t
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(1 row)
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SELECT observer_lat('40.0N 105.3W 1655m'::observer) AS lat,
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observer_lon('40.0N 105.3W 1655m'::observer) AS lon;
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lat | lon
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-----+--------
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40 | -105.3
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(1 row)
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-- ECI type parsing
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SELECT '(1000.0,2000.0,3000.0,1.0,2.0,3.0)'::eci_position IS NOT NULL AS eci_ok;
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eci_ok
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--------
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t
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(1 row)
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SELECT eci_x('(1000.0,2000.0,3000.0,1.0,2.0,3.0)'::eci_position) AS x;
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x
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------
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1000
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(1 row)
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-- SGP4 propagation at epoch
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WITH iss AS (
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SELECT '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'::tle AS t
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)
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SELECT
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round(eci_speed(sgp4_propagate(t, '2024-01-01 12:00:00+00'))::numeric, 2) AS speed_kms,
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round(eci_altitude(sgp4_propagate(t, '2024-01-01 12:00:00+00'))::numeric, 0) AS alt_km
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FROM iss;
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speed_kms | alt_km
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-----------+--------
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7.67 | 407
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(1 row)
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-- Altitude overlap operator
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WITH sats AS (
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SELECT '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'::tle AS iss,
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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'::tle AS gps
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)
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SELECT
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iss && iss AS same_overlap,
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iss && gps AS different_no_overlap
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FROM sats;
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same_overlap | different_no_overlap
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--------------+----------------------
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t | f
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(1 row)
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-- Subsatellite point
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WITH iss AS (
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SELECT '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'::tle AS t
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)
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SELECT
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round(geodetic_lat(subsatellite_point(t, '2024-01-01 12:00:00+00'))::numeric, 2) AS lat,
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round(geodetic_alt(subsatellite_point(t, '2024-01-01 12:00:00+00'))::numeric, 0) AS alt_km
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FROM iss;
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lat | alt_km
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-------+--------
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51.75 | 420
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(1 row)
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-- GiST index creation
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CREATE TABLE test_sats (id serial, tle tle);
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INSERT INTO test_sats (tle) VALUES (
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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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CREATE INDEX test_sats_gist ON test_sats USING gist (tle);
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SELECT count(*) FROM test_sats WHERE tle && (
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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'::tle);
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count
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-------
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1
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(1 row)
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DROP TABLE test_sats;
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