v0.7.1

** Python 3.10 Builder Bug Fix **

v0.7.0

What's New

• python-sgp4 interoperablity: astroz is now a drop in replacement for python-sgp4. Simply change your import line to from astroz and get a 2x speedup! Follow the full migration guide for even more gains up to 100x compared to sgp4.

What's Changed

• python-sgp4 compatability layer by @ATTron in #70

Full Changelog: v0.6.1...v0.7.0

v0.6.1

What's Changed

• python documentation by @ATTron in #67
• Sgp4 OOM handling by @ATTron in #68

Full Changelog: v0.6.0...v0.6.1

v0.6.0

Breaking Changes

Removed APIs

• Sgp4 class - Single satellite propagator removed from Python bindings
• load_constellation() - Backward compatibility alias removed
• min_distances() - Standalone function removed
• coarse_screen() - Standalone function removed
• WGS84 constant - No longer exported

Constellation class changes

• propagate() method removed from class (now a module-level function)
• metadata property and with_metadata parameter removed
• batch_size property removed
• out parameter for pre-allocated output removed

New API

The Python API is now simplified to two main functions:

  from astroz import Constellation, propagate, screen
  # Parse TLEs once for repeated use
  c = Constellation("starlink")
  # Propagate satellites
  positions = propagate(c, times, start_time=dt, output="ecef")
  positions, velocities = propagate(c, times, velocities=True)
  # Conjunction screening - single target (fastest, fused propagate+screen)
  min_dists, t_indices = screen(c, times, threshold=10.0, target=0)
  # Conjunction screening - all-vs-all
  pairs, t_indices = screen(c, times, threshold=10.0)

Migration Guide

Propagating a constellation:

# Before
c = Constellation("starlink")
positions = c.propagate(times)
# After
c = Constellation("starlink")
positions = propagate(c, times)

Loading a constellation:

# Before
c = load_constellation("starlink")
# After
c = Constellation("starlink")

Conjunction screening:

# Before
positions = c.propagate(times)
pairs = coarse_screen(positions, threshold=10.0)
distances, t_indices = min_distances(positions, pairs)
# After
pairs, t_indices = screen(c, times, threshold=10.0)
Single-target screening:
# Before
positions = c.propagate(times)
pairs = coarse_screen(positions, threshold=10.0)
# ... filter pairs for target ...
# After (faster - fused propagate+screen)
min_dists, t_indices = screen(c, times, threshold=10.0, target=0)

Single satellite propagation:

# Before
sgp4 = Sgp4(tle)
pos, vel = sgp4.propagate(30.0)

# After
positions = propagate(tle_string, [30.0])

What's Changed

• conjunction screening returns incorrect tuple value by @ATTron in #63
• update sgp4 example to use propagateN by @arrufat in #66
• Update zignal dependency by @arrufat in #65
• faster conjunction by @ATTron in #64

Full Changelog: v0.5.0...v0.6.0

v0.5.0

What's Changed

• feat: 8 wide SIMD by @ATTron in #62
• deprecation of *V4 in favor of *VN to capture both V4 simd and V8 simd accurately

Full Changelog: v0.4.4...v0.5.0

v0.4.4

What's Changed

• feat(core): add SIMD ECEF coordinate rotation by @ATTron in #59
• feat: constellation propagation with epoch offsets and output modes by @ATTron in #60
• add multithreading by @ATTron in #61

Full Changelog: v0.4.3...v0.4.4

v0.4.3

What's Changed

• remove unneeded functions by @ATTron in #55
• clean up python bindings by @ATTron in #56
• macos dynamic lib by @ATTron in #58

Full Changelog: v0.4.2...v0.4.3

v0.4.2

What's Changed

• SIMD SGP4 omptimizations

Full Changelog: v0.4.1...v0.4.2

v0.4.1

• small fix to the github action with the proper zig build flags

v0.4.0

Biggest Change

• Add SGP4 prop and offer C API / python bindings into it
  • This implementation is the fastest open source option for SGP4 orbit prop

What's Changed

• PD-51: LSK kernel parsing by @ATTron in #35
• PD-16: fix file readers by @ATTron in #36
• fix tcp timing bugs introduced by @ATTron in #38
• fix issues with new Io package by @ATTron in #40
• clean up some formatting by @ATTron in #39
• io changes by @ATTron in #41
• bump zignal to fix breaking FITS tests by @ATTron in #42
• make things a little less choatic by @ATTron in #43
• clean up imports by @ATTron in #44
• spg4 prop by @ATTron in #45
• refactor how orbit prop is designed by @ATTron in #46
• maneuver updates by @ATTron in #47
• C API + Python Bindings by @ATTron in #48
• package python bindings Part 1 by @ATTron in #49
• spg4 with python and benchmarks by @ATTron in #50

Full Changelog: v0.3.0...v0.4.0