Science Modifications

Click and scroll table to left to see more science modifications listed.

AircraftZenith PortsNadir PortsModified WindowsExternal AntennasWing Pylon MountsOptical WindowsDropsonde CapabilitySonobuoy CapabilitySampling ProbesInstrument RacksPowerSeating CapacityComms/SATCOMNotable Features
B777None4x Small (27” x 19”, angled), 2x Large (44” x 40”)4 (23” x 16” oval)NoneNoneNumerous optionsNRD-41 and RD-41AXTCD or similarNumerous options~20, numerous115V 60Hz/400Hz  @30A, 28V DC @ 5AUp to 200None listedHigh seating capacity, Power Upgrades, House Keeping Rack, Nadir Portals, XCS & AMP (operator console/ EE-power provisions) modifications, Conf Tables), DropSonde tube Instl FY25, Lower Fuse skin Doublers Acreage 
P-31x 16”, 1x radiometer boat (2 instruments), 1x 3” port, 1x KT-19, mod. engineer hatch3 fuselage, 2 large, 1 small, 6 oblique, bomb bay,  side looking ports with motorized door7 (4 P-3 bubble + 3 DC-8 style)Various GPS + splitters10 pylonsAvailableDropsonde + free fallYes (pressurized tube)Available~20 (10 double), numerous115V 60Hz, 400Hz, 28V DCUp to 24INMARSAT, CERTUS, VOIPAir Science Data System, EGI, KT-19, AIS, bomb bay deployments,  INMARSAT and CERTUS SATCOM systems, VOIP, WiFI, USB,18Kip payload, Radome/Tailcone mods, Iridium Phone, Upgraded ICS.
B-2001 Zenith inlet, 1 Zenith portal fwd of windshield2 (29.5x29.5, 26.75x22.5), shutters C/S.2 lateral portalsGPS, research antennae2 wingtip pylons (32kg max each)BK-7 panesAft nadirNone notedYes, PS connectionsMultiple115V-60Hz@3X10A,4200W, 28V DC, 3X50AUp to 4Iridium SATCOM voice/textApplanix AVX210, FMS, Stormscope, EGPWS, research panels. HALO 275 GVW Upgrade to 14k lbs, 5-blade Raisbeck Propellers, Raisbeck Strakes, High Flotation gear doors, Saddle tanks, Rasibeck Ram Air, Butterfield Anti-ice,AVCON portals, Norton Radome, ferry tanks, wingtip pylon. MD302-SAM, WX Radar 
ER-23 on wing pods2 (Q-bay), 1 (Nose), 4 (Wing pods), 1 (Centerline)NoneUHF, VHF, HF, GPS, VOR/ILS, ADFWing podsNone notedNone notedNone notedT/P probes, multiple baysQ-bay racks (up to 825 lbs)Not specifiedSingle pilotNAVREC, INSNose pod, aft cavity, tailcone, cheek, wingtips
C-20ANone notedCustom mount UAVSARNone notedNone notedNone notedNone notedNone notedNone notedNone noted1 UAVSAR rackNot specifiedMinimal (crew only)Not specifiedUAVSAR dedicated
G-IIINone noted2 (18.16 in x 18.16 in) with FOD shuttersNone7 antennas (3 GPS, 2 Iridium, 1 Applanix, 1 ADS-B/UAT)NoneOptical panesDropsonde (through baggage)None notedYes18U racks + risersStandard 115V 60Hz, 28V DC, 2x150AA, 80 A of 120 VAC /60 Hz power, 15 A of 14 VDC, 20 A of 5 VDCUp to 10IridiumApplanix AVX210, NASDAT, Engineer’s station. Upgraded ICS. Refreshed engines HSI . 
G-IVNone notedNone specifiedOptical optionHF, VHF, UHFNone notedYes (optional)Not specifiedNot specifiedNot specifiedNot specified28V DC, 115V AC4 double + 5 singleIridium GO!, Short BurstShirt-sleeve cabin, cargo door 64x81.5, AirSAR

Table 1 : Aircraft Research Capabilities: Science Modifications and Payload Accommodations