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config.py
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# This file defines the satellite configuration used in our simulation.
# We will be using Starlink Phase 1, shell 1, for our simulation. The following config is taken from Hypatia.
import math
import yaml
def get_config_yaml_dict(filename):
with open(filename, "r") as stream:
try:
return yaml.safe_load(stream)
except yaml.YAMLError as exc:
raise ValueError(exc)
HYPATIA_DIR = "../dependencies/hypatia"
CLUSTER_DIR = "../k8s-emulator"
CLUSTER_CONFIG_FILE = "../k8s-emulator/cluster_config.yaml"
CLUSTER_CONFIG = get_config_yaml_dict(CLUSTER_CONFIG_FILE)
# WGS72 value; taken from https://geographiclib.sourceforge.io/html/NET/NETGeographicLib_8h_source.html
EARTH_RADIUS = 6378135.0
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550"
NICE_NAME = "Starlink-550"
# STARLINK 550
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = 940700 # the value used here is actually assuming 30.3 deg min angle of elevation. Refer to Notion.
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 72
NUM_SATS_PER_ORB = 22
INCLINATION_DEGREE = 53
if CLUSTER_CONFIG["constellation_name"] == "Starlink-560":
# GENERATION CONSTANTS
BASE_NAME = "starlink_560"
NICE_NAME = "Starlink-560"
# STARLINK 550
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.04 # Altitude ~560 km
ALTITUDE_M = 560000 # Altitude ~560 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = 1200930 # the value used here is actually assuming 30.3 deg min angle of elevation. Refer to Notion.
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 6
NUM_SATS_PER_ORB = 58
INCLINATION_DEGREE = 97.6
if CLUSTER_CONFIG["constellation_name"] == "Kuiper-630":
# GENERATION CONSTANTS
BASE_NAME = "kuiper_630"
NICE_NAME = "Kuiper-630"
# KUIPER 630
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Kuiper's FCC filing as below:
# [1]: https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/8716
################################################################
MEAN_MOTION_REV_PER_DAY = 14.80 # Altitude ~630 km
ALTITUDE_M = 630000 # Altitude ~630 km
# Considering an elevation angle of 30 degrees; possible values [1]: 20(min)/30/35/45
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(30.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 34
NUM_SATS_PER_ORB = 34
INCLINATION_DEGREE = 51.9
if CLUSTER_CONFIG["constellation_name"] == "Telesat-1015":
# GENERATION CONSTANTS
BASE_NAME = "telesat_1015"
NICE_NAME = "Telesat-1015"
# TELESAT 1015
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Telesat's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MPL-20200526-00053/2378318.pdf
################################################################
MEAN_MOTION_REV_PER_DAY = 13.66 # Altitude ~1015 km
ALTITUDE_M = 1015000 # Altitude ~1015 km
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(10.0)) # Considering an elevation angle of 10 degrees;
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 27
NUM_SATS_PER_ORB = 13
INCLINATION_DEGREE = 98.98
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550-72-72":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550_72_72"
NICE_NAME = "Starlink-550-72-72"
# STARLINK 550 72 72
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(25.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 72
NUM_SATS_PER_ORB = 72
INCLINATION_DEGREE = 53
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550-48-48":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550_48_48"
NICE_NAME = "Starlink-550-48-48"
# STARLINK 550 48 48
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(25.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 48
NUM_SATS_PER_ORB = 48
INCLINATION_DEGREE = 53
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550-100-100":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550_100_100"
NICE_NAME = "Starlink-550-100-100"
# STARLINK 550 100 100
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(25.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 100
NUM_SATS_PER_ORB = 100
INCLINATION_DEGREE = 53
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550-130-130":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550_130_130"
NICE_NAME = "Starlink-550-130-130"
# STARLINK 550 130 130
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(25.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 130
NUM_SATS_PER_ORB = 130
INCLINATION_DEGREE = 53
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550-150-150":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550_150_150"
NICE_NAME = "Starlink-550-150-150"
# STARLINK 550 150 150
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(25.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 150
NUM_SATS_PER_ORB = 150
INCLINATION_DEGREE = 53
if CLUSTER_CONFIG["constellation_name"] == "Starlink-550-200-200":
# GENERATION CONSTANTS
BASE_NAME = "starlink_550_200_200"
NICE_NAME = "Starlink-550-200-200"
# STARLINK 550 200 200
ECCENTRICITY = 0.0000001 # Circular orbits are zero, but pyephem does not permit 0, so lowest possible value
ARG_OF_PERIGEE_DEGREE = 0.0
PHASE_DIFF = True
################################################################
# The below constants are taken from Starlink's FCC filing as below:
# [1]: https://fcc.report/IBFS/SAT-MOD-20190830-00087
################################################################
MEAN_MOTION_REV_PER_DAY = 15.19 # Altitude ~550 km
ALTITUDE_M = 550000 # Altitude ~550 km
# From https://fcc.report/IBFS/SAT-MOD-20181108-00083/1569860.pdf (minimum angle of elevation: 25 deg)
SATELLITE_CONE_RADIUS_M = ALTITUDE_M / math.tan(math.radians(25.0))
MAX_GSL_LENGTH_M = math.sqrt(math.pow(SATELLITE_CONE_RADIUS_M, 2) + math.pow(ALTITUDE_M, 2))
# ISLs are not allowed to dip below 80 km altitude in order to avoid weather conditions
MAX_ISL_LENGTH_M = 2 * math.sqrt(math.pow(EARTH_RADIUS + ALTITUDE_M, 2) - math.pow(EARTH_RADIUS + 80000, 2))
NUM_ORBS = 200
NUM_SATS_PER_ORB = 200
INCLINATION_DEGREE = 53
def config_generate_constellation():
"""Pass constellation config information to calling function"""
return [
BASE_NAME,
NICE_NAME,
ECCENTRICITY,
ARG_OF_PERIGEE_DEGREE,
PHASE_DIFF,
MEAN_MOTION_REV_PER_DAY,
ALTITUDE_M,
MAX_GSL_LENGTH_M,
MAX_ISL_LENGTH_M,
NUM_ORBS,
NUM_SATS_PER_ORB,
INCLINATION_DEGREE,
]