1) Hollin Hill
Target ID – HH1/HH2/HH3/HH4/HH5/HH6
Latitude (following the ID order) 54.111466/ 54.111268 / 54.111108 / 54.110957/ 54.11068/ 54.110377
Longitude (following the ID order) -0.960136 / -0.959929 / -0.959806/ -0.959893/ -0.959787 / -0.959411
Compass heading of bottom panel – 350 degrees from the North
Inclination – 30 degree from the horizontal surface
Size of each side – 0.76 m
Open side facing – west
Type – trihedral
General Location: Hollin Hill, Yorkshire, United Kingdom
Date last inspected: 30/10/2019
wavelength that the reflector is intended for: 0.56m (C-band) perforations (if any) size and density: no perforations

2) Herstmonceux - they are two in the same location just facing different directions for the ascending and descending geometry
Target ID – HRST01/ HRST02
Latitude: 50.867386/ 50.867386
Longitude: 0.335725/0.335725
Compass heading of bottom panel – 350 degrees from the North for the one oriented towards the ascending geometry and 10 degrees from the North for the one oriented towards the descending geometry
Inclination – 20 degree from the horizontal surface
Size of each side – 1 m
Open side facing – west for the one oriented towards the ascending geometry and east for the one oriented towards the descending geometry
Type – trihedral
General Location: Herstmonceux, East Sussex, United Kingdom
Date last inspected: 4/3/2020
wavelength that the reflector is intended for: 0.56m (C-band) perforations (if any) size and density: no perforations

3) Keywort - they are two in the same location just facing different directions for the ascending and descending geometry
Target ID – KWRT
Latitude: 52.879936
Longitude: -1.080353
Compass heading of bottom panel – 350 degrees from the North for the one oriented towards the ascending geometry and 10 degrees from the North for the one oriented towards the descending geometry.
Inclination – 20 degree from the horizontal surface
Size of each side – 0.65 m
Open side facing –east for the Sentinel-1 descending geometry
Type – trihedral
General Location: Keyworth, East Midlands, United Kingdom
Date last inspected: 23/06/2020
wavelength that the reflector is intended for: 0.56m (C-band) perforations (if any) size and density: no perforations

4) Hatfield Moors (HM)- three corner reflectors in the same location
Target ID – HM1, HM2 and HM3
Latitude, Longitude: 53.53881, -0.95675 for HM1; 53.53474, -0.95568 for HM2 and 53.55087, -0.94104 for HM3
Compass heading of bottom panels: 350 degrees from the North for the all of them (oriented towards the ascending LOS).
Inclination – 25 degree from the horizontal surface
Size of each side – 1 m
Open side facing –west for all of the (oriented towards the ascending LOS)
Type – trihedral
General Location: Hatfield Moors, Yorkshire, United Kingdom
Date last inspected: 27/12/2020
wavelength that the reflector is intended for: 0.56m (C-band) perforations (if any) size and density: each reflectors has been fixed to the terrain with two 0.5m long ‘hurricane ground anchor' screws.

5) Sutton Bonington (SB) - three corner reflectors in the same location
Target ID – SB1, SB2 and SB3
Latitude, Longitude: 52.83771, -1.24781 for SB1; 52.83802, -1.24778 for SB2 and 52.83798, -1.24914 for SB3
Compass heading of bottom panels: 350 degrees from the North for the all of them (oriented towards the ascending LOS).
Inclination – 25 degree from the horizontal surface
Size of each side – 1 m
Open side facing –west for all of the (oriented towards the ascending LOS)
Type – trihedral
General Location: Sutton Bonington, Nottinghamshire, United Kingdom
Date last inspected: 7/05/2021
wavelength that the reflector is intended for: 0.56m (C-band) perforations (if any) size and density: each reflectors has been fixed to the terrain with three 0.5m long ‘ground anchor' screws.

SB1	SB2
SB3

6) Glasgow (GSW) - two corner reflectors
Target ID – GSW1 (the active reflector) and GSW2 (the passive reflector)
Latitude, Longitude: 55.839393, -4.199945 for GSW1; 55.836119, -4.19957 for GSW2
For the active reflector (GSW1), these are the specs:.

• Configured for track 30 of the ascending geometry and track 52 of the descending geometry of Sentinel-1.
• VV channel polarisation
• The size of the active reflector is 0.6m x 0.4m
• perforations (if any) size and density: the reflector has been bolted to a concrete platform with four 10 cm long screws.

For the passive reflector (GSW2), these are the specs:

• Compass heading of bottom panels: 350 degrees from the North for the all of them (oriented towards the ascending LOS).
• Inclination: 25 degree from the horizontal surface.
• Size of each side: 0.7m.
• Open side facing: west for all of the (oriented towards the ascending LOS).
• Type: trihedral
• perforations (if any) size and density: the reflector has been bolted to a concrete platform with four 10 cm long screws.

General Location: Cuningar Loop, Glasgow, United Kingdom
Installation date: 15/6/2021
Date last inspected: 28/7/2021
wavelength that the reflector is intended for: 0.56m (C-band)

GSW1	GSW2