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Renamed gr test python script and notebook
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,176 @@ | ||
| { | ||
| "cells": [ | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "import swiftest\n", | ||
| "from astroquery.jplhorizons import Horizons\n", | ||
| "import datetime\n", | ||
| "import numpy as np\n", | ||
| "import matplotlib.pyplot as plt" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "sim_gr = swiftest.Simulation(simdir=\"gr\")\n", | ||
| "sim_gr.add_solar_system_body([\"Sun\",\"Mercury\",\"Venus\",\"Earth\",\"Mars\",\"Jupiter\",\"Saturn\",\"Uranus\",\"Neptune\"])" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "sim_nogr = swiftest.Simulation(simdir=\"nogr\")\n", | ||
| "sim_nogr.add_solar_system_body([\"Sun\",\"Mercury\",\"Venus\",\"Earth\",\"Mars\",\"Jupiter\",\"Saturn\",\"Uranus\",\"Neptune\"])" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "run_args = {\"tstop\":1000.0, \"dt\":0.005, \"tstep_out\":10.0, \"dump_cadence\": 0,\"integrator\":\"helio\"}" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "sim_gr.run(**run_args,general_relativity=True)" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "sim_nogr.run(**run_args,general_relativity=False)" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "# Get the start and end date of the simulation so we can compare with the real solar system\n", | ||
| "start_date = sim_gr.ephemeris_date\n", | ||
| "tstop_d = sim_gr.param['TSTOP'] * sim_gr.param['TU2S'] / swiftest.JD2S\n", | ||
| "\n", | ||
| "stop_date = (datetime.datetime.fromisoformat(start_date) + datetime.timedelta(days=tstop_d)).isoformat()" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "#Get the ephemerides of Mercury for the same timeframe as the simulation\n", | ||
| "obj = Horizons(id='1', location='@sun',\n", | ||
| " epochs={'start':start_date, 'stop':stop_date,\n", | ||
| " 'step':'10y'})\n", | ||
| "el = obj.elements()\n", | ||
| "t = (el['datetime_jd']-el['datetime_jd'][0]) / 365.25\n", | ||
| "varpi_obs = el['w'] + el['Omega']" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "# Compute the longitude of the periapsis\n", | ||
| "sim_gr.data['varpi'] = np.mod(sim_gr.data['omega'] + sim_gr.data['capom'],360)\n", | ||
| "sim_nogr.data['varpi'] = np.mod(sim_nogr.data['omega'] + sim_nogr.data['capom'],360)" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "varpisim_gr= sim_gr.data['varpi'].sel(name=\"Mercury\")\n", | ||
| "varpisim_nogr= sim_nogr.data['varpi'].sel(name=\"Mercury\")\n", | ||
| "tsim = sim_gr.data['time']" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "dvarpi_gr = np.diff(varpisim_gr) * 3600 * 100 / run_args['tstep_out']\n", | ||
| "dvarpi_nogr = np.diff(varpisim_nogr) * 3600 * 100 / run_args['tstep_out']\n", | ||
| "dvarpi_obs = np.diff(varpi_obs) / np.diff(t) * 3600 * 100" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "fig, ax = plt.subplots()\n", | ||
| "\n", | ||
| "ax.plot(t, varpi_obs, label=\"JPL Horizons\",linewidth=2.5)\n", | ||
| "ax.plot(tsim, varpisim_gr, label=\"Swiftest helio GR\",linewidth=1.5)\n", | ||
| "ax.plot(tsim, varpisim_nogr, label=\"Swiftest helio No GR\",linewidth=1.5)\n", | ||
| "ax.set_xlabel('Time (y)')\n", | ||
| "ax.set_ylabel('Mercury $\\\\varpi$ (deg)')\n", | ||
| "ax.legend()\n", | ||
| "plt.savefig(\"helio_gr_mercury_precession.png\",dpi=300)\n", | ||
| "print('Mean precession rate for Mercury long. peri. (arcsec/100 y)')\n", | ||
| "print(f'JPL Horizons : {np.mean(dvarpi_obs)}')\n", | ||
| "print(f'Swiftest No GR : {np.mean(dvarpi_nogr)}')\n", | ||
| "print(f'Swiftest GR : {np.mean(dvarpi_gr)}')\n", | ||
| "print(f'Obs - Swiftest GR : {np.mean(dvarpi_obs - dvarpi_gr)}')\n", | ||
| "print(f'Obs - Swiftest No GR : {np.mean(dvarpi_obs - dvarpi_nogr)}')" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [] | ||
| } | ||
| ], | ||
| "metadata": { | ||
| "kernelspec": { | ||
| "display_name": "Python (My debug_env Kernel)", | ||
| "language": "python", | ||
| "name": "debug_env" | ||
| }, | ||
| "language_info": { | ||
| "codemirror_mode": { | ||
| "name": "ipython", | ||
| "version": 3 | ||
| }, | ||
| "file_extension": ".py", | ||
| "mimetype": "text/x-python", | ||
| "name": "python", | ||
| "nbconvert_exporter": "python", | ||
| "pygments_lexer": "ipython3", | ||
| "version": "3.8.5" | ||
| } | ||
| }, | ||
| "nbformat": 4, | ||
| "nbformat_minor": 4 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| #!/usr/bin/env python | ||
| import swiftest | ||
| from astroquery.jplhorizons import Horizons | ||
| import datetime | ||
| import numpy as np | ||
| import matplotlib.pyplot as plt | ||
|
|
||
| sim_gr = swiftest.Simulation(simdir="gr") | ||
| sim_gr.add_solar_system_body(["Sun","Mercury","Venus","Earth","Mars","Jupiter","Saturn","Uranus","Neptune"]) | ||
|
|
||
| sim_nogr = swiftest.Simulation(simdir="nogr") | ||
| sim_nogr.add_solar_system_body(["Sun","Mercury","Venus","Earth","Mars","Jupiter","Saturn","Uranus","Neptune"]) | ||
|
|
||
| run_args = {"tstop":1000.0, "dt":0.005, "tstep_out":10.0, "dump_cadence": 0,"integrator":"helio"} | ||
|
|
||
| sim_gr.run(**run_args,general_relativity=True) | ||
| sim_nogr.run(**run_args,general_relativity=False) | ||
|
|
||
| # Get the start and end date of the simulation so we can compare with the real solar system | ||
| start_date = sim_gr.ephemeris_date | ||
| tstop_d = sim_gr.param['TSTOP'] * sim_gr.param['TU2S'] / swiftest.JD2S | ||
|
|
||
| stop_date = (datetime.datetime.fromisoformat(start_date) + datetime.timedelta(days=tstop_d)).isoformat() | ||
|
|
||
| #Get the ephemerides of Mercury for the same timeframe as the simulation | ||
| obj = Horizons(id='1', location='@sun', | ||
| epochs={'start':start_date, 'stop':stop_date, | ||
| 'step':'10y'}) | ||
| el = obj.elements() | ||
| t = (el['datetime_jd']-el['datetime_jd'][0]) / 365.25 | ||
| varpi_obs = el['w'] + el['Omega'] | ||
|
|
||
| # Compute the longitude of the periapsis | ||
| sim_gr.data['varpi'] = np.mod(sim_gr.data['omega'] + sim_gr.data['capom'],360) | ||
| sim_nogr.data['varpi'] = np.mod(sim_nogr.data['omega'] + sim_nogr.data['capom'],360) | ||
|
|
||
| varpisim_gr= sim_gr.data['varpi'].sel(name="Mercury") | ||
| varpisim_nogr= sim_nogr.data['varpi'].sel(name="Mercury") | ||
| tsim = sim_gr.data['time'] | ||
|
|
||
| dvarpi_gr = np.diff(varpisim_gr) * 3600 * 100 / run_args['tstep_out'] | ||
| dvarpi_nogr = np.diff(varpisim_nogr) * 3600 * 100 / run_args['tstep_out'] | ||
| dvarpi_obs = np.diff(varpi_obs) / np.diff(t) * 3600 * 100 | ||
|
|
||
| fig, ax = plt.subplots() | ||
|
|
||
| ax.plot(t, varpi_obs, label="JPL Horizons",linewidth=2.5) | ||
| ax.plot(tsim, varpisim_gr, label="Swiftest Helio GR",linewidth=1.5) | ||
| ax.plot(tsim, varpisim_nogr, label="Swiftest Helio No GR",linewidth=1.5) | ||
| ax.set_xlabel('Time (y)') | ||
| ax.set_ylabel('Mercury $\\varpi$ (deg)') | ||
| ax.legend() | ||
| plt.savefig("helio_gr_mercury_precession.png",dpi=300) | ||
|
|
||
| print('Mean precession rate for Mercury long. peri. (arcsec/100 y)') | ||
| print(f'JPL Horizons : {np.mean(dvarpi_obs)}') | ||
| print(f'Swiftest No GR : {np.mean(dvarpi_nogr)}') | ||
| print(f'Swiftest GR : {np.mean(dvarpi_gr)}') | ||
| print(f'Obs - Swiftest GR : {np.mean(dvarpi_obs - dvarpi_gr)}') | ||
| print(f'Obs - Swiftest No GR : {np.mean(dvarpi_obs - dvarpi_nogr)}') |