Lady Heather（简称LH）是由Mark S. Sims开发的一款GPS接收器/GPSDO/原子钟/频率计数器的监控软件，支持大多数主流设备，使用方便，堪称时间相关设备的万金油。目前最新的版本是v6.14beta。
支持设备如下：
/rx – auto-detect receiver type (default)
/rxa – Acron Zeit WWVB receiver (300:8:N:2)
/rxai – Trimble ACE-III (9600:8:O:1)
/rxag – Trimble Acutime GG (9600:8:O:1)
/rxat – Trimble Acutime Gold and earlier versions (9600:8:O:1)
/rxa3 – Trimble Acutime 360 (115200:8:O:1)
/rxb – Brandywine GPS-4 receiver – 4800:8:N:1
/rxca – calculator only mode
/rxc – UCCM – Trimble / Symmetricom / Samsung GPSDOs – 57600:8:N:1
(auto-detect sub-type)
/rxcp – UCCM-P – Trimble / Symmetricom GPSDOs – 57600:8:N:1
/rxcs – UCCM LPK/L8 – Samsung GPSDOs – 57600:8:N:1
/rxcu – UCCM – Trimble / Symmetricom GPSDOs – 57600:8:N:1
/rxd – DATUM STARLOC II GPSDO – inferior wannabe Thunderbolt
/rxe – NEC GPSDO … STAR-4 compatible at (115200:8:N:1)
/rxen – Environmental sensors
/rxes – Furuno eSIP receivers
/rxf – Lucent RFTG-m GPSDO
/rxfu – Furuno GT-8031 (using $PFEC commands)
/rxg – GPSD interface (not really a Windows thing – /ip=localhost:2947)
/rxh – HP 5071A cesium beam oscillator
/rxi – TAPR TICC time interval counter (115200:8:N:1)
/rxj – Jupiter-T (aka Zodiac)
/rxk – Lucent KS24361 REF0/Z3811A (19200:8:N:1)
/rxl – Jackson Labs LTE Lite (38400,8,N,1)
/rxlp – Temex/Specratime LPFRS or RMO rubidium (1200:8:N:1)
/rxm – Motorola binary
/rxn – NMEA
/rxo – TruePosition GPS
/rxp – Trimble TAIP receivers (4800:8:N:1)
/rxpa – Trimble Palisade (9600:8:O:1)
/rxpp – Tom Van Baak’s PICPET timestamping counter chip
/rxpr – SRS PRS-10 rubidium oscillator
/rxr – Trimble Resolution T family with odd parity
/rxs – Sirf binary
/rxsa – Symmetricom SA22.c rubidium with 60 Mhz osc (forced model type)
/rxsb – Symmetricom SA22.c rubidium with 58982400.0 Hz osc (forced model type)
/rxsy – Symmetricom X72/X99/SA22 rubidium (60 Mhz osc) (auto detect model)
/rxss – Novatel SuperStar II (19200,8,N,1) – currently untested
/rxsr – Spectratime SRO100/SRO70 rubidium
/rxt – Trimble TSIP binary,
/rxtb – terminal emulator only (with buffered keyboard).
/rxte – terminal emulator only.
/rxtm – Spectrum TM4 GPSDO (setting features untested)
/rxts – TymServe 2000.
/rxu – Ublox UBX binary,
/rxut – Ublox UBX binary (with TP5 timing messages),
/rxv – Venus/Navspark mixed binary / NMEA (115200:8:N:1)
(auto-detects timing/RTK models)
/rxvb – Venus/Navspark RTK receiver in BASE mode (115200:8:N:1)
/rxvp – Motorol Oncore (VP) receiver
/rxvr – Venus/Navspark RTK receiver in ROVER mode (115200:8:N:1)
/rxvt – Venus/Navspark timing receivers (115200:8:N:1)
/rxx – No receiver, uses system clock.
/rxx7 – Symmetricom X72 rubidium (forced model type)
/rxx9 – Symmetricom X99 rubidium (forced model type)
/rxy – SCPI – Nortel telecom GPSDOs like NTWB and NTPX
/rxz – SCPI (Z3801A style. 19200:7:O:1)
/rx5 – SCPI (HP5xxxx style)
/rx0 – Gravity/solid earth tide clock (uses system clock to display
solid earth tides and gravity offset, requires manual entry
of latitude/longitude/altitude)
/rx1 – HP531xx (or other) counter (9600:8:N:1)
/rx12 – Ashtech Z12 L1/L2 GPS receiver
/rx17 – Trimble RT17 format GPS receivers (115200,8,N,1)
/rx3 – Zyfer Nanosync 380 (19200:8:N:1)
/rx35 – Symmetricom SA.35m rubidium(57600:8:N:2) – code not completed
/rx4 – Oscilloquartz STAR-4 GPSDO (9600:8:N:2)
/rx45 – Oscilloquartz OSA-453X GPSDO (9600:8:N:2)
/rx6 – Trimble SV6/SV8 (9600:8:O:1) (also ACE-III)
/rx8 – NVS BINR binary (115200:8:N:1)
