Towards an improvement of the geoid model in Japan by GOCE data: A case study of the Shikoku area

Earth, Planets and Space

Table 3. Standard deviations of the differences between observed and GGMs-implied free-air gravity anomalies in Japan (units in mGal), n represents the spherical harmonic degrees.

GGM	Hokkaido	North Honshu	Central Honshu	West Honshu	Shikoku	Kyushu	Whole
n = 150
EGM2008	41.6	27.0	40.2	33.5	27.8	18.4	35.7
DIR1	41.5	27.4	40.4	33.1	27.5	18.5	35.7
DIR2	41.6	27.2	40.4	33.2	27.5	18.4	35.7
DIR3	41.6	27.2	40.4	33.3	27.6	18.3	35.7
SPWS 2	41.6	27.2	40.4	33.1	27.5	18.4	35.7
TIM2	41.6	27.1	40.4	33.2	27.5	18.4	35.7
TIM3	41.6	27.1	40.4	33.3	27.6	18.3	35.7
GOCO02S	41.5	27.1	40.5	33.4	27.5	18.3	35.7
n = 180
EGM2008	37.1	26.1	40.1	28.5	24.1	21.4	33.0
DIR1	37.3	26.3	40.2	28.7	23.6	21.8	33.2
DIR2	37.7	26.2	40.3	28.3	24.0	21.8	33.3
DIR3	37.6	26.2	40.3	28.4	24.0	21.5	33.2
SPWS 2	37.7	26.3	40.3	28.4	23.8	21.5	33.3
TIM2	37.8	26.2	40.4	28.3	24.0	21.8	33.3
TIM3	37.6	26.2	40.3	28.4	24.1	21.6	33.2
GOCO02S	37.6	26.2	40.5	28.3	24.1	21.8	33.3
n = 210
EGM2008	34.5	27.4	41.9	25.7	23.5	22.0	32.5
DIR1	34.6	27.7	42.3	26.2	23.3	22.6	32.8
DIR2	35.4	27.8	42.4	26.1	22.2	21.8	32.9
DIR3	35.1	28.0	42.0	25.7	23.0	21.7	32.7
SPWS 2	35.4	27.3	41.8	26.2	23.1	21.0	32.7
TIM2	35.6	27.8	42.3	25.7	22.7	21.7	32.9
TIM3	35.0	27.8	41.9	25.7	23.1	21.8	32.7
GOCO02S	35.4	27.7	42.4	25.8	22.9	21.7	32.9
n = 240
EGM2008	32.5	26.1	42.1	23.3	26.2	20.5	31.4
DIR1	32.7	26.8	42.4	24.2	26.7	20.9	31.9
DIR2	35.1	25.9	43.4	24.8	24.5	21.6	32.6
DIR3	34.0	26.5	42.6	25.0	24.3	20.8	32.2
SPWS 2	35.3	26.6	41.6	25.7	22.9	21.0	32.4
TIM2	34.6	25.8	43.0	24.7	23.8	20.8	32.3
TIM3	33.6	26.1	42.8	25.0	24.3	20.6	32.1
GOCO02S	34.5	25.9	43.1	24.9	23.9	20.8	32.3