Traveling Master Cal Transfer Record

Sphere Date of Last Cross-Calibration Days since Last
SEDNA 2026-02-06 28
LUCY 2025-12-24 72
OBELIX 2025-10-21 136
TEIDE 2025-11-26 100
LILLE NONE N/A

Traveling Master Location

Master Current Location Shipped Date Days at Site
902 GSFC 2026-01-14 51
1096 GSFC 2026-01-06 59
1105 GSFC 2026-03-02 4

Last Sun Cal

Master Last Sun Cal Date Days Since Last Sun Cal
902 2025-03-21 350
1096 2025-06-25 254
1105 2025-03-21 350
1232 2025-10-04 153

Characterization Record (NASA calibration)

GRANDE Master Sphere

Date of Last NIST Characterization Days Since Last NIST Characterization
2025-12-29 67

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