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Gloucester County Amateur Radio Club

Gloucester County Amateur Radio Club

Skunkworks Advanced Project Team

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      • Configuring DMR Hotspot for GCARC Talk Group
      • Connecting to the GCARC DMR TalkGroup with a Yaesu System Fusion Radio and a Hotspot
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      • Open GD77 on Baofeng DM1701
      • Pi-based OpenGD77 Flasher: Bypassing Windows Driver Headaches
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      • SDR Tech Saturday Presentation January 2025
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        • Installing PiAware Using the Prebuilt SD Card Image with Raspberry Pi Imager
        • Installing PiAware using Command Line Commands
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      • Getting Started with Meshtastic on 915 MHz
      • How to Join the GCARC Channel on Your Meshtastic Device Using a QR Code
      • Installing the Meshtastic CLI on a Windows PC
      • Window-Mounted 915 MHz Meshtastic Yagi Antenna Project
      • Meshtastic CLI Commands
    • Exploring Ham Radio Digital Modes: Packet Radio and WSJT-X
      • Packet Radio (AX.25) in Amateur Digital Communications
      • Exploring WSJT Digital Modes
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      • Satellite Mode for the UV-PRO
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      • TIDRADIO TD-H3 Transceiver: Comprehensive Briefing
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Upcoming ISS APRS Activities

📡 ISS APRS Pass Report

Location: GCARC W2MMD Clubhouse

Coordinates: 39.73465°N, -75.20691°W

Report Generated: March 08, 2026 at 08:00 AM EST

Period: Next 14 Days

Filter: High-elevation passes (≥70°) any day, any time

About ISS APRS: The International Space Station operates an APRS digipeater on 145.825 MHz
(1200 baud AFSK). This report shows high-elevation passes (≥70°) when you can work the ISS digipeater with
a handheld radio and modest antenna. High-elevation passes provide the best line-of-sight and strongest
signals for successful packet radio contacts. These nearly-overhead passes occur any day and any time.
Equipment Requirements:

  • Radio: VHF transceiver capable of 145.825 MHz FM (any HT with 5W will work)
  • TNC/Interface: Terminal Node Controller or sound card interface for 1200 baud AFSK
  • Software: APRS client (Xastir, YAAC, APRSDroid, etc.)
  • Antenna: Simple vertical works well for high passes; better results with directional
  • Path: Use ARISS for digipeating through ISS

Friday, March 13, 2026

2:36 AM – 2:46 AM 73° max
Start: 2:36 AM at 306° (NW) – ISS rises above horizon
Highest Point: 2:41 AM at 214° (SW), 73° elevation
End: 2:46 AM at 134° (SE) – ISS sets below horizon
Duration: 10 minutes 40 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Friday, March 20, 2026

5:01 PM – 5:12 PM 75° max
Start: 5:01 PM at 235° (SW) – ISS rises above horizon
Highest Point: 5:07 PM at 329° (NNW), 75° elevation
End: 5:12 PM at 52° (NE) – ISS sets below horizon
Duration: 10 minutes 50 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Monday, March 09, 2026

4:07 AM – 4:18 AM 76° max
Start: 4:07 AM at 306° (NW) – ISS rises above horizon
Highest Point: 4:13 AM at 215° (SW), 76° elevation
End: 4:18 AM at 133° (SE) – ISS sets below horizon
Duration: 10 minutes 40 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Monday, March 16, 2026

6:34 PM – 6:44 PM 77° max
Start: 6:34 PM at 235° (SW) – ISS rises above horizon
Highest Point: 6:39 PM at 322° (NW), 77° elevation
End: 6:44 PM at 52° (NE) – ISS sets below horizon
Duration: 10 minutes 50 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Sunday, March 08, 2026

9:37 PM – 9:48 PM 83° max
Start: 9:37 PM at 233° (SW) – ISS rises above horizon
Highest Point: 9:42 PM at 323° (NW), 83° elevation
End: 9:48 PM at 52° (NE) – ISS sets below horizon
Duration: 10 minutes 45 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Thursday, March 12, 2026

8:05 PM – 8:16 PM 80° max
Start: 8:05 PM at 234° (SW) – ISS rises above horizon
Highest Point: 8:11 PM at 319° (NW), 80° elevation
End: 8:16 PM at 52° (NE) – ISS sets below horizon
Duration: 10 minutes 50 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Tuesday, March 17, 2026

1:04 AM – 1:14 AM 70° max
Start: 1:04 AM at 306° (NW) – ISS rises above horizon
Highest Point: 1:09 AM at 223° (SW), 70° elevation
End: 1:14 AM at 134° (SE) – ISS sets below horizon
Duration: 10 minutes 45 seconds
Frequency: 145.825 MHz FM (1200 baud AFSK)
Path: Use ARISS for digipeating

Operating Tips:

  • ISS APRS uses ARISS as the digipeater path (not WIDE1-1 or other terrestrial paths)
  • Start transmitting when ISS is 10-15° above horizon
  • High-elevation passes (>60°) provide 4-6 minute windows for successful contacts
  • Use short position beacons and messages – packet collisions are common
  • Monitor 145.825 MHz to see your packets digipeated back
  • Check ARISS status before operating

Pass predictions from N2YO.com. Times in EST. Doppler shift is minimal at VHF for APRS packet radio.

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  • Home
  • Club Activities
    • Saturday Clubhouse Satellite Opportunities
    • Upcoming ISS APRS Activities
    • Upcoming ISS Viewing Opportunities
    • GOES 19 Weather Video
    • Recent DMR Activity
    • Weekly Satellite Report
  • Clubhouse
    • Saturday Clubhouse Weather
    • The GCARC Clubhouse
    • Grounding Project
    • Networking Infrastructure
    • Work and Test Bench
    • Clubhouse Satellite Station
      • Satellite Rotator Controller
    • SatNOGS Ground Station
    • Earth-Moon-Earth (EME)
    • Discovery Satellite Snooping Dish
    • GOES-19 Satellite Reception
    • Clubhouse Remote nRSP-ST Resource
    • Skunkworks GitHub Resource
    • ISS SSTV
    • NOAA Weather Fax
    • ADS-B
  • Technical Resources
    • 3D Printed Projects
    • DMR
      • What is a DMR Codeplug?
        • What Are DMR Channels?
        • What Are DMR Timeslots?
        • What is a Talkgroup in DMR?
        • What Are DMR Zones?
      • What is a DMR Hotspot?
      • Configuring DMR Hotspot for GCARC Talk Group
      • Connecting to the GCARC DMR TalkGroup with a Yaesu System Fusion Radio and a Hotspot
      • Using DM-1701 CPS Program
      • Open GD77 on Baofeng DM1701
      • Pi-based OpenGD77 Flasher: Bypassing Windows Driver Headaches
    • Software-Defined Radios
      • Software Defined Radio Demystified
      • Installing an RTL-SDR on a Windows PC
      • SDR Tech Saturday Presentation January 2025
      • SDR Client Applications for Mac
      • Creating a PiAware Station to Track Airplanes
        • Installing PiAware Using the Prebuilt SD Card Image with Raspberry Pi Imager
        • Installing PiAware using Command Line Commands
    • Meshtastic
      • Getting Started with Meshtastic on 915 MHz
      • How to Join the GCARC Channel on Your Meshtastic Device Using a QR Code
      • Installing the Meshtastic CLI on a Windows PC
      • Window-Mounted 915 MHz Meshtastic Yagi Antenna Project
      • Meshtastic CLI Commands
    • Exploring Ham Radio Digital Modes: Packet Radio and WSJT-X
      • Packet Radio (AX.25) in Amateur Digital Communications
      • Exploring WSJT Digital Modes
    • BTECH UV-PRO Radio
      • Satellite Mode for the UV-PRO
    • TIDRADIO H3 Resources
      • TIDRADIO TD-H3 Transceiver: Comprehensive Briefing
      • Overview of Stock Firmware Menu System
      • Comparison of Stock TIDRADIO Firmware vs. nicFW V2 Firmware
    • Balloon Project
      • Balloon Launch – 2025-03-17
    • Tech Saturday Presentations
  • STEM Activities
    • STEM Club Weather
    • STEM Club Villanova Trip
  • Public Service
    • Winlink VHF and HF Gateways
    • APRS Weather Reporting Station
    • AREDN Development
  • The Foundation
  • Blog
  • Contact

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