CASH data

CASH project reprocessing for Topex data cycles 10 (1992/12/22) to 359 (2002/06/23) To obtain a subset of this data, please use this form to specify your request

CASH is a "Terre et Espace" project, funded by the french Ministry of Research to develop and promote new services using remote data, and involving industrial and scientific partners. This project aims at demonstrating how to use satellite altimetry to address the need of a global survey system of water resources. A consortium with all scientific, instrumental, and operational skills has been created, gathering: IRD/HyBAM, IRD/ESPACE, LEGOS/GOHS, CLS and BRLi.

We provide CASH project reprocessing output of Topex data cycles 10 (1992/12/22) to 359 (2002/06/23) (but only 289 cycles present). The complete list of available cycles is:

010, 011, 012, 013, 014, 015, 016, 017, 018, 019, 030, 032, 033, 034, 035, 036, 037, 038, 039, 040, 042, 043, 044, 045, 046, 047, 048, 049, 050, 051, 052, 053, 054, 056, 057, 064, 066, 067, 068, 069, 070, 071, 072, 073, 074, 075, 076, 077, 078, 080, 081, 082, 083, 084, 085, 086, 087, 088, 089, 090, 092, 093, 094, 095, 096, 098, 099, 100, 101, 102, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 121, 122, 123, 124, 125, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 139, 140, 141, 142, 143, 144, 145, 146, 147, 149, 151, 154, 155, 156, 157, 158, 159, 160, 161, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 175, 176, 177, 178, 179, 181, 182, 183, 184, 185, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 211, 212, 213, 214, 215, 217, 218, 219, 220, 221, 222, 223, 225, 226, 227, 228, 229, 230, 231, 232, 233, 235, 236, 237, 238, 239, 240, 241, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 254, 255, 257, 258, 259, 260, 261, 262, 263, 264, 265, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 279, 280, 281, 282, 283, 284, 285, 287, 291, 293, 294, 295, 296, 297, 298, 300, 301, 302, 303, 304, 305, 306, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 345, 346, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359

More info on the CASH project at at: http://www.cls.fr/html/oceano/general/applications/cash_en.html

Please fill in this form in order to be registered as a CTOH CASH data user and be able to get the data

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Scientific information

Objective Description of the intended study

Requested Data Please check at least one of the following fields (shown index number, field name, description)

Northern point coordinate The eastern limit of your region

Southern point coordinate The southern limit of your region

Western point coordinate The western limit of your region

Eastern point coordinate The eastern limit of your region

Starting Date Start date for request (1992/10/14 to 2013/04/19)

Year / Month / Day Hour : Minute AM/PM

Ending Date (1992/10/14 to 2013/04/19)

Year / Month / Day Hour : Minute AM/PM

CTOH CASH data use policy

The CTOH (Centre de Topographie des Océans et de l'Hydrosphère) is a French National Observation Service, supported by INSU (Institut National des Sciences de l'Univers). Its role is to assist scientific users and the different space agencies in the development of new altimetric applications. To this end, the CTOH provides access to their frequently updated altimetric data bases, including Topex-Poseidon, Jason-1, Jason-2, GFO, and ENVISAT data, with improved corrections, and to the altimetric products developed by the CTOH.

CTOH products are provided free of charge under the condition that they are exclusively used for scientific studies and experiments. This implies that:

   - Copying the CTOH Products for use by third parties is strictly forbidden.
    - Granting access to the CTOH Products for use by third parties is strictly forbidden.
    - Commercial use of the CTOH products, or products directly derived from them, is strictly forbidden.

The CASH product mayl evolve over time. We also ask that the users communicate to us any problems they find with the data products.

Finally, the data and products are for research purposes. The CTOH cannot be held for responsible for the scientific utilisation of the data.

This dataset can be used freely for any scientific applications provided that one or more of the papers listed below are cited (please choose the most relevant in respect to your application) and CTOH is acknowledged.

References to cite when using this product

CASH consortium gathering: IRD/HyBAM, IRD/ESPACE, LEGOS/GOHS, CLS and BRLi.

I accept the CTOH data use policy

1. dsr_time MDSR Time stamp. Time fields based on UTC are computed for each record and referred to the center of the averaged waveform.
2. quality_flag Quality Indicator (-1 for blank MDSR, 0 otherwise)
3. spare_1 null
4. lat Geodetic Latitude (positive N, negative S)
5. lon Longitude (positive E, 0 at Greenwich, negative W)
6. src_pack_cnt Source Packet Counter
7. instr_mode_id_flags Instrument Mode ID
8. meas_conf_data_flags Measurement Confidence Data
9. alt_cog_ellip Altitude of CoG above reference ellipsoid
10. hz18_diff_1hz_alt 18 Hz altitude differences from 1 Hz altitude [20].
11. instant_alt_rate Instantaneous altitude rate
12. spare_2 null
13. hz18_ku_trk_cog 18 Hz Ku tracker range referenced to the COG (no Doppler correction) [20]
14. hz18_s_trk_cog 18 Hz S tracker range referenced to the COG (no Doppler correction) [20]
15. map_18hz_ku_trk_flags Map of valid points for 18 Hz Ku-band tracker range.
16. spare_3 null
17. ku_band_ocean_range Ku-band ocean range
18. s_band_ocean_range S-band ocean range
19. hz18_ku_band_ocean 18 Hz Ku-band ocean ranges [20]
20. hz18_s_band_ocean 18 Hz S-band ocean ranges [20]
21. sd_18hz_ku_ocean Standard deviation of 18 Hz Ku-band ocean range
22. sd_18hz_s_ocean Standard deviation of 18 Hz S-band ocean range
23. num_18hz_ku_ocean Number of 18 Hz valid points for Ku-band ocean range
24. num_18hz_s_ocean Number of 18 Hz valid points for S-band ocean range
25. map_18hz_ku_ocean_flags Map of 18 Hz valid points for Ku-band ocean range. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data bock) containing : 0= valid measurement, 1= invalid. Unused bits set to 0. Bit 0 applies to the first data block.
26. map_18hz_s_ocean_flags Map of 18 Hz valid points for S-band ocean range. First 20 least significant bits (bits 0-19) correspond to the 20 values(one per data bock) containing : 0= valid measurement, 1= invalid. Unused bits set to 0. Bit 0 applies to the first data block.
27. hz18_ku_ice1 18 Hz Ku-band ice1 ranges [20]
28. hz18_s_ice1 18 Hz S-band ice1 ranges [20]
29. hz18_ku_ice2 18 Hz Ku-band ice2 ranges [20]
30. hz18_s_ice2 18 Hz S-band ice2 ranges [20]
31. hz18_ku_seaice 18 Hz Ku-band sea-ice ranges [20]
32. spare_4 null
33. hz18_ku_instr_corr 18 Hz Ku-band range instrumental correction [20]
34. hz18_s_instr_corr 18 Hz S-band range instrumental correction [20]
35. hz18_ku_dopp_corr 18 Hz Ku-band Doppler correction [20]
36. hz18_s_dopp_corr 18 Hz S-band Doppler correction [20]
37. hz18_ku_dopp_slp_corr 18 Hz Ku-band Delta Doppler Slope correction [20]
38. hz18_s_dopp_slp_corr 18 Hz S-band Delta Doppler Slope correction [20]
39. mod_dry_tropo_corr Model dry tropospheric correction
40. inv_barom_corr Inverted barometer correction
41. mod_wet_tropo_corr Model wet tropospheric correction
42. mwr_wet_tropo_corr MWR derived wet tropospheric correction
43. ra2_ion_corr_ku RA2 ionospheric correction on Ku-band
44. ra2_ion_corr_s RA2 ionospheric correction on S-band
45. ion_corr_doris_ku Ionospheric correction from DORIS on Ku-band
46. ion_corr_doris_s Ionospheric correction from DORIS on S-band
47. ion_corr_mod_ku Ionospheric correction from model on Ku-band
48. ion_corr_mod_s Ionospheric correction from model on S-band
49. sea_bias_ku Sea state bias on Ku-band
50. sea_bias_s Sea state bias on S-band
51. spare_5 null
52. ku_sig_wv_ht_sq Square of Ku-band Significant wave height
53. s_sig_wv_ht_sq Square of S-band Significant wave height
54. ku_sig_wv_ht Ku-band Significant wave height
55. s_sig_wv_ht S-band Significant wave height
56. sd_18hz_ku_swh Standard deviation of 18 Hz Ku-band SWH
57. sd_18hz_s_swh Standard deviation of 18 Hz S-band SWH
58. num_18hz_ku_ocean_swh Number of 18 Hz valid points for Ku-band ocean SWH
59. num_18hz_s_ocean_swh Number of 18 Hz valid points for S-band ocean SWH
60. slp_mod_flags Slope model present flags [20 bits]: First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0= valid measurement, 1= invalid. Unused bits set to 0. Bit 0 applies to the first data block
61. elev_echo_pt 1 Hz Elevation of echoing point
62. hz18_diff_mean_ech_pt 18 Hz Elevation differences of echoing point from mean [20]
63. hz18_diff_1hz_lat 18 Hz slope-corrected latitude differences from 1 Hz latitude [20]
64. hz18_diff_1hz_long 18 Hz slope-corrected longitude differences from 1 Hz longitude [20]
65. hz18_ku_ice2_edge_width 18 Hz Ku-band Ice 2 leading edge width [20]
66. hz18_s_ice2_edge_width 18 Hz S-band Ice 2 leading edge width [20]
67. spare_6 null
68. hz18_ku_k_cal_ku 18 Hz Ku-band K_cal_Ku [20]
69. hz18_s_k_cal_s 18 Hz S-band K_cal_S [20]
70. map_18hz_k_cal_ku_flags Map of valid points for 18 Hz K-cal_Ku: First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0= valid measurement, 1= invalid. Unused bits set to 0. Bit 0 applies to the first data block
71. spare_7 null
72. ku_ocean_bscat_coeff Ku-band corrected Ocean backscatter coefficient
73. s_ocean_bscat_coeff S-band corrected Ocean backscatter coefficient
74. sd_18hrz_ku_ocean_bscat Standard deviation of 18 Hz Ku-band ocean backscatter coefficient
75. sd_18hrz_s_ocean_bscat Standard deviation of 18 Hz S-band ocean backscatter coefficient
76. num_18hrz_ku_ocean_bscat Number of 18 Hz valid points for Ku-band ocean backscatter coefficient
77. num_18hrz_s_ocean_bscat Number of 18 Hz valid points for S-band ocean backscatter coefficient
78. hz18_ku_ice1_bscat 18 Hz Ku-band Ice1 backscatter coefficient [20]
79. hz18_s_ice1_bscat 18 Hz S-band Ice1 backscatter coefficient [20]
80. hz18_ku_ice2_edge_bscat 18 Hz Ku-band Ice2 leading edge backscatter coefficient [20]
81. hz18_s_ice2_edge_bscat 18 Hz S-band Ice2 leading edge backscatter coefficient [20]
82. hz18_ku_ice2_bscat 18 Hz Ku-band Ice2 backscatter coefficient [20]
83. hz18_s_ice2_bscat 18 Hz S-band Ice2 backscatter coefficient [20]
84. hz18_ku_seaice_bscat 18 Hz Ku-band sea-ice backscatter coefficient [20]
85. spare_8 null
86. ku_net_instr_corr_agc Ku-band net instrument correction for AGC
87. s_net_instr_corr_agc S-band net instrument correction for AGC
88. ku_atm_atten_corr Ku-band atmospheric attenuation correction.
89. s_atm_atten_corr S-band atmospheric attenuation correction.
90. k_rai_atten Ku-band rain attenuation
91. off_nad_ang_platf Square of the satellite off nadir angle square from platform data
92. off_nad_ang_wvform Square of the satellite off nadir angle square from platform data
93. hz18_1st_edge_ice2_ku 18 Hz Ku-band slope of the first part of the trailing edge from ice-2 retracker [20]
94. hz18_1st_edge_ice2_s 18 Hz S-band slope of the first part of the trailing edge from ice-2 retracker [20]
95. hz18_2nd_edge_ice2_ku 18 Hz Ku-band slope of the second part of the trailing edge from ice-2 retracker [20]
96. hz18_2nd_edge_ice2_s 18 Hz S-band slope of the second part of the trailing edge from ice-2 retracker [20]
97. spare_9 null
98. m_sea_surf_ht Mean sea-surface height
99. geoid_ht Geoid height
100. ocean_depland_elev Ocean depth/land elevation
101. tot_geocen_ocn_tide_ht_sol1 Total geocentric ocean tide height (solution 1)
102. tot_geocen_ocn_tide_ht_sol2 Total geocentric ocean tide height(solution 2)
103. long_period_ocn_tide_ht Long period Tide height
104. tidal_load_ht Tidal loading height (Solution 2)
105. solid_earth_tide_ht Solid earth tide height
106. geocen_pole_tide_ht Geocentric pole tide height
107. mod_surf_atm_pres Model surface atmospheric pressure
108. mwr_wvapour_cont MWR water vapour content
109. mwr_liq_vapour_cont MWR liquid water content
110. ra2_elec_cont RA2 Total electron content.
111. ra2_wind_sp RA2 wind speed
112. mod_wind_sp_u U component of the model wind vector
113. mod_wind_sp_v V component of the model wind vector
114. tidal_load_ht_1 Tidal loading height (Solution 1)
115. spare_10 null
116. interpole_238_temp_mwr Interpolated 23.8 GHz brightness temperature from MWR
117. interpole_365_temp_mwr Interpolated 36.5 GHz brightness temperature from MWR
118. interpole_sd_238_temp_mwr Interpolated standard deviation of MWR 23.8 GHz brightness temperature.
119. interpole_sd_365_temp_mwr Interpolated standard deviation of MWR 36.5 GHz brightness temperature.
120. spare_11 null
121. ave_ku_chirp Average Ku chirp band
122. ku_chirp_id_flags Ku chirp band id [40 bits] First 40 least significant bits (bits 0-39) correspond to the 20 values (one per data block). Unused bits set to 0. Bits 0-1 apply to the first data block.
123. error_flag_chirp_id_flags Error flag for chirp band id [20 bits]First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0= valid measurement, 1= invalid. Unused bits set to 1. Bit 0 applies to the first data block.
124. instr_flags Instrument flag
125. fault_id_flags Fault identifier [20 bits] First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0= valid measurement, 1= invalid. Unused bits set to 1. Bit 0 applies to the first data block.
126. spare_12 null
127. wvform_fault_id_flags Waveforms samples fault identifier [40 bits]First 40 least significant bits (bits 0-39) correspond to the 20 values (one per data block). Unused bits set to 0. Bits 0-1 apply to the first data block.
128. instr_id_data_level_flags Instrument mode ID at data block level [80 bits]First 80 least significant bits (0-79) correspond to the 20 values (one per data block). Unused bits set to 0. Bits 0 to 3 apply to the first data block.
129. num_meas_ku_calibr No. of measures for Ku flight calibration factor evaluation.
130. num_meas_s_calibr No. of measures for Ku flight calibration factor evaluation.
131. mwr_instr_flags MWR instrument flag
132. spare_13 null
133. spare_14 null
134. spare_15 null
135. ku_ocean_retrk_qua_flags Ku-band ocean retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
136. s_ocean_retrk_qua_flags S-band ocean retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
137. ku_ice1_retrk_qua_flags Ku-band ice1 retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
138. s_ice1_retrk_qua_flags S-band ice1 retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
139. ku_ice2_retrk_qua_flags Ku-band ice2 retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
140. s_ice2_retrk_qua_flags S-band ice2 retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
141. ku_seaice_retrk_qua_flags Ku-band sea-ice retracking quality [20 bits]. First 20 least significant bits (bits 0-19) correspond to the 20 values (one per data block) containing: 0=valid, 1=invalid. Unused bits set to 0. Bit 0 applies to the first data block.
142. ku_peak 1 Hz Ku-band peakiness
143. s_peak 1 Hz S-band peakiness
144. altim_landocean_flag Altimeter surface type flag
145. radio_landocean_flag Radiometer land/ocean flag
146. mwr_qua_interp_flag MWR Quality interpolation flag
147. rain_flag Altimeter rain flag
148. interpole_flag Interpolation flag
149. sea_ice_flag Sea ice flag
150. membership_1 Membership 1
151. membership_2 Membership 2
152. membership_3 Membership 3
153. membership_4 Membership 4
154. spare_16 null

Center for Topographic studies of the Ocean and Hydrosphere

CASH data

CTOH CASH data use policy

References to cite when using this product

CASH consortium gathering: IRD/HyBAM, IRD/ESPACE, LEGOS/GOHS, CLS and BRLi.

Center for Topographic studies
of the Ocean and Hydrosphere