Traveling Master Cal Transfer Record

Sphere Date of Last Cross-Calibration Days since Last
SEDNA 2026-01-05 5
LUCY 2025-12-24 17
OBELIX 2025-10-21 81
TEIDE 2025-11-26 45
LILLE NONE N/A

Traveling Master Location

Master Current Location Shipped Date Days at Site
902 NEON 2025-12-15 23
1096 GSFC 2026-01-06 4
1105 LILLE 2025-10-08 439

Last Sun Cal

Master Last Sun Cal Date Days Since Last Sun Cal
902 2025-03-21 295
1096 2025-06-25 199
1105 2025-03-21 295
1232 2025-10-04 98

Characterization Record (NASA calibration)

GRANDE Master Sphere

Date of Last NIST Characterization Days Since Last NIST Characterization
2025-12-29 12

GRANDE Master Sphere Radiance Trends

(History of NIST-traceable absolute calibrations)

All Lamps: 380nm

All Lamps: 440nm

All Lamps: 500nm

All Lamps: 670nm

All Lamps: 870nm

All Lamps: 1020nm

All Lamps: 1640nm


Observed Sphere Trends from Traveling Sphere Transfer Masters

(Based on raw signal data from cimel measurements)

Relative: Grande Plots

Relative: Sedna Plots

Absolute: Grande Plots

Absolute: Sedna Plots



Record of Sphere Transfer Corrections to Match GRANDE Radiance

SEDNA (@ GSFC)

All Wavelengths (plot)


LUCY (@ NEON) Trend

All Wavelengths (plot)


OBELIX (@ RIMA) Trend


TEIDE (@ RIMA) Trend