<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 14:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.02.22 (053) 14:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605302221440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.383" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.066" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="3.390" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.360" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="383.054" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.371" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.416" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="174.703" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.768" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="96.848" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="214.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 313.333 316.667 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 330.000 330.000 332.500 335.000 337.143 339.286 341.429 343.571 345.714 347.857 350.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 380.000 375.000 380.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 455.000 455.000 460.000 465.000 465.000 475.000 475.000 480.000 485.000 485.000 495.000 500.000 500.000 505.000 510.000 510.000 520.000 525.000 530.000 535.000 535.000 540.000 545.000 555.000 560.000 565.000 575.000 580.000 590.000 600.000 605.000 617.500 630.000 642.500 658.123 676.324 697.801
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 51 0 54 51 0 51 57 51 54 54 57 51 57 0 0 0 0 0 0 48 54 0 54 57 57 57 60 57 57 57 57 57 0 51 60 0 60 51 57 60 57 51 60 60 51 57 54 48 60 60 66 66 66 66 66 66 66 63 63 63 63 60 63 60 63 63 63 60 57 57 57 60 60 57 54 54 51 51 51 54 54 54 54 54 51 51 48 51 51 48 51 48 45 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 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 -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 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 -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 -0.390625
</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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.552 113.105 114.657 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.054 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.281 2.934 3.28 3.39 3.267 3.267 3.39 3.401 3.55 3.685 3.814 3.939 4.064 4.189 4.316 4.444 4.575 4.708 4.844 4.984 5.126 5.271 5.418 5.568 5.719 5.871 6.024 6.176 6.329 6.48 6.631 6.78 6.927 7.073 7.217 7.359 7.5 7.638 7.775 7.909 8.042 8.174 8.303 8.431 8.557 8.682 8.805 8.927 9.046 9.164 9.279 9.392 9.502 9.608 9.709 9.803 9.89 9.965 10.027 10.071 10.096 10.1 10.1 10.095 10.085 10.071 10.052 10.028 10.0 9.968 9.932 9.892 9.849 9.802 9.751 9.698 9.642 9.583 9.521 9.456 9.39 9.321 9.25 9.177 9.102 9.026 8.948 8.869 8.788 8.706 8.623 8.539 8.455 8.369 8.283 8.196 8.108 8.02 7.932 7.844 7.755 7.666 7.577 7.488 7.399 7.31 7.221 7.132 7.044 6.956 6.868 6.781 6.694 6.607 6.521 6.436 6.351 6.266 6.183 6.099 6.017 5.935 5.853 5.773 5.693 5.614 5.535 5.457 5.38 5.304 5.229 5.154 5.08 5.007 4.935 4.863 4.792 4.722 4.653 4.585 4.518 4.451 4.385 4.32 4.256 4.192 4.13 4.068 4.007 3.947 3.887 3.828 3.77 3.713 3.657 3.601 3.546 3.492 3.439 3.386 3.334 3.283 3.233 3.183 3.134 3.086 3.038 2.991 2.945 2.899 2.854 2.81 2.766 2.723 2.68 2.639 2.598 2.557 2.517 2.478 2.439 2.401 2.363 2.326 2.289 2.254

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.39" PeakHeight="110.0" Num="3" Error="0.0">
-30.5 13.151 -3.167
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.39" EndFrequency="10.1" PeakHeight="383.054" Num="5" zHalfNm="247.371" Error="5.502">
-235.929 -47.462 20.154 -8.534 3.374
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.657" Depth="0.123"/>
<TopsideChapman PeakHeight="383.054" PeakDensity="1265632.8" PeakScaleHeight="96.848" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
