<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 21:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.06 (037) 21:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202603702062100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.701" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.544" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.447" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="367.058" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="293.242" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.235" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.611" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.900" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.388" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.860" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="191">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 260.000 260.000 260.714 261.429 262.143 262.857 263.571 264.286 265.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 285.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 296.250 297.500 298.750 300.000 300.000 300.000 300.000 300.455 300.909 301.364 301.818 302.273 302.727 303.182 303.636 304.091 304.545 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 321.667 323.333 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 340.000 340.833 341.667 342.500 343.333 344.167 345.000 347.500 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 367.500 365.000 365.000 370.000 375.000 375.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 396.667 398.333 400.000 401.667 403.333 405.000 410.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 480.000 486.661 494.249 502.973 513.107 525.024 539.239 556.488 577.860
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 51 0 63 0 0 0 0 51 60 63 60 57 57 54 60 63 63 66 63 63 60 57 0 66 63 0 60 0 0 0 0 0 0 0 0 0 69 0 0 60 66 0 0 0 63 0 66 66 0 0 0 0 60 0 0 0 0 0 57 66 57 0 63 66 51 69 69 66 66 63 0 66 66 66 0 0 66 57 0 0 66 69 0 69 69 69 0 69 72 63 69 69 0 69 0 0 0 72 57 60 66 0 69 72 60 0 66 72 72 0 69 72 69 0 69 69 72 63 66 69 72 60 0 66 69 72 57 57 72 69 0 72 72 0 66 69 69 60 60 69 63 69 69 60 66 66 66 63 66 63 63 63 63 0 0 60 0 0 0 54 57 51 57 51 54 48 54 48 54 51 54 54 51 54 51 51 48 48 51 51 51 0 54 0 54 54 48 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.953125 -2.734375 -1.171875 -1.171875 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.959 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.661 125.0 130.0 133.321 135.0 140.0 144.982 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.058 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.204 0.967 1.254 1.401 1.447 1.42 1.339 1.298 1.298 1.298 1.298 1.319 1.383 1.447 1.447 1.574 1.695 1.813 1.934 2.057 2.185 2.318 2.459 2.607 2.764 2.931 3.109 3.3 3.505 3.724 3.959 4.21 4.479 4.764 5.066 5.384 5.717 6.063 6.419 6.784 7.155 7.529 7.905 8.279 8.651 9.016 9.374 9.722 10.057 10.377 10.679 10.959 11.215 11.443 11.64 11.801 11.924 12.007 12.046 12.05 12.047 12.027 11.989 11.935 11.866 11.783 11.686 11.578 11.459 11.33 11.193 11.047 10.894 10.734 10.57 10.4 10.227 10.05 9.87 9.688 9.505 9.32 9.134 8.949 8.763 8.578 8.393 8.21 8.028 7.847 7.669 7.492 7.317 7.145 6.975 6.807 6.642 6.48 6.321 6.164 6.01 5.859 5.711 5.566 5.424 5.285 5.149 5.015 4.885 4.757 4.633 4.511 4.392 4.276 4.163 4.052 3.944 3.839 3.736 3.635 3.538 3.442 3.349 3.259 3.171 3.085 3.001 2.919 2.84 2.762 2.687 2.614 2.542 2.473 2.405 2.339 2.275 2.212 2.151 2.092 2.035 1.979 1.924 1.871 1.82 1.769 1.721 1.673 1.627 1.582 1.538 1.496 1.454 1.414 1.375 1.337 1.3 1.264 1.229 1.195 1.162 1.129 1.098 1.068 1.038 1.009 0.981 0.954 0.927 0.902 0.877 0.852 0.829 0.806 0.783 0.762 0.74 0.72 0.7 0.68 0.661 0.643 0.625 0.608 0.591 0.575 0.559

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.447" PeakHeight="110.0" Num="3" Error="0.0">
-27.997 9.727 -1.771
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.447" EndFrequency="12.05" PeakHeight="367.058" Num="5" zHalfNm="293.242" Error="3.588">
-197.473 -25.263 -0.825 -0.39 1.875
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="34.982" Depth="0.149"/>
<TopsideChapman PeakHeight="367.058" PeakDensity="1801519.9" PeakScaleHeight="55.388" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
