Author: Behrouz Safari
License: MIT
numeph
Convert JPL SPK ephemeris to numpy array
Installation
Install the latest version of numeph from PyPI:
pip install numeph
Requirements are numpy and jplephem
Save some segments of 'de440s.bsp' from 2020 to 2030:
from datetime import datetime
from numeph import SPK
t1 = datetime(2020, 1, 1)
t2 = datetime(2030, 1, 1)
spk = SPK(fname='de440s.bsp', t1=t1, t2=t2,
segs_tup=[(0,10), (0,3), (3,399), (3,301)])
# save as txt file
spk.to_txt('de440s_2020_2030.txt')
# save as pickle
spk.to_pickle('de440s_2020_2030.pickle')
Load .txt or .pickle files:
You can load the above saved files using load_txt and load_pickle functions. The will return a dictionary of Segment objects.
from numeph import load_txt
dc = load_txt('de440s_2020_2030.txt')
To access each segment, pass the (center, target) tuple as dictionary key.
seg = dc[(3,301)]
get position of an object from a segment:
t = datetime.utcnow()
pos = seg.get_pos(t)
See more at astrodatascience.net
1 maintainer
Metadata
1 maintainer
Release files for numeph 0.3.4
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| numeph-0.3.4.tar.gz | 5.9 kB | Without provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| numeph-0.3.4-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 12.5 kB
Release files / numeph-0.3.4.tar.gz
| Download URL | numeph-0.3.4.tar.gz |
|---|---|
| Size | 5.9 kB |
| Tags | Source |
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Release files / numeph-0.3.4-py3-none-any.whl
| Download URL | numeph-0.3.4-py3-none-any.whl |
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| Size | 6.7 kB |
| Tags | Python 3 |
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