<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 22:20:00.000"
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) 22:20:00</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">
FF202603702062220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.428" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.342" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="555.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="465.975" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="403.578" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.771" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.467" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.974" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.095" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 385.000 385.000 383.750 382.500 381.250 380.000 385.000 385.625 386.250 386.875 387.500 388.125 388.750 389.375 390.000 390.000 395.000 395.000 390.000 392.000 394.000 396.000 398.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 412.500 415.000 410.000 410.000 410.000 410.000 410.000 420.000 420.000 420.000 415.000 420.000 422.500 425.000 435.000 435.000 435.000 435.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 441.250 442.500 443.750 445.000 445.000 445.000 450.000 450.000 450.000 450.000 450.000 447.500 445.000 450.000 450.000 455.000 455.000 455.000 450.000 455.000 460.000 460.000 465.000 462.500 460.000 460.000 460.000 465.000 465.000 465.000 470.000 470.833 471.667 472.500 473.333 474.167 475.000 475.000 475.000 475.000 477.500 480.000 480.000 480.000 480.000 480.000 480.000 485.000 487.500 490.000 490.000 490.000 490.000 495.000 495.000 495.000 495.000 495.000 500.000 500.000 500.000 500.000 505.000 505.000 505.000 510.000 515.000 517.500 520.000 520.000 525.000 525.000 530.000 535.000 535.000 537.500 540.000 545.000 545.000 550.000 555.000 555.000 560.000 564.801 570.275 576.577 583.907 592.540 602.859 615.409
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 57 60 0 0 0 60 69 0 0 0 0 0 0 0 72 69 69 66 57 0 0 57 0 63 0 57 66 0 69 66 69 0 63 0 63 0 0 0 72 72 0 63 0 57 63 0 66 72 51 57 54 60 63 60 0 72 63 0 72 75 57 66 63 72 0 69 69 0 66 69 69 0 66 63 69 69 75 57 0 0 72 69 54 66 72 78 78 75 69 60 0 63 72 57 0 69 72 75 72 0 75 69 0 72 57 57 0 63 72 75 72 57 66 72 69 66 69 66 75 57 57 57 60 66 57 0 69 69 69 69 69 81 72 78 81 72 66 72 54 69 69 63 66 63 57 60 57 63 60 57 63 60 57 57 57 57 57 54 57 57 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.02 145.0 150.0 155.0 160.0 165.0 170.0 172.039 175.0 180.0 185.0 190.0 195.0 200.0 203.059 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 465.975 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.264 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.24 0.264 0.289 0.314 0.339 0.354 0.378 0.445 0.517 0.594 0.675 0.76 0.849 0.943 1.04 1.142 1.249 1.36 1.476 1.598 1.724 1.857 1.995 2.14 2.29 2.448 2.613 2.784 2.964 3.151 3.346 3.55 3.763 3.985 4.217 4.458 4.709 4.97 5.242 5.524 5.817 6.12 6.433 6.756 7.087 7.426 7.771 8.119 8.469 8.817 9.158 9.486 9.797 10.081 10.332 10.541 10.701 10.805 10.849 10.85 10.842 10.813 10.762 10.692 10.604 10.5 10.382 10.251 10.107 9.954 9.792 9.622 9.446 9.264 9.077 8.887 8.694 8.5 8.304 8.107 7.91 7.714 7.519 7.325 7.133 6.943 6.756 6.571 6.389 6.21 6.034 5.861 5.692 5.526 5.364 5.206 5.051 4.9 4.752 4.608 4.468 4.332 4.199 4.069 3.943 3.821 3.702 3.586 3.474 3.365 3.259 3.156 3.056 2.959 2.865 2.774 2.686 2.6 2.517 2.436 2.358 2.283 2.209 2.138 2.069 2.003 1.938 1.876 1.815 1.757 1.7 1.645 1.592 1.54 1.49 1.442 1.395 1.35 1.306 1.264 1.223 1.183 1.144 1.107 1.071 1.036 1.003 0.97 0.938 0.908 0.878 0.85 0.822 0.795 0.769 0.744 0.72 0.697 0.674 0.652 0.631 0.61 0.59 0.571 0.552 0.534 0.517

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="10.85" PeakHeight="465.975" Num="5" zHalfNm="403.578" Error="2.473">
-236.98 -44.33 20.156 -1.185 -0.577
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.059" Depth="0.154"/>
<TopsideChapman PeakHeight="465.975" PeakDensity="1460576.9" PeakScaleHeight="47.095" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
