<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 09:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.01.29 (029) 09:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901290940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.161" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.288" 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="8.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="7.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="340.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.798" 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="290.654" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.405" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.603" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="88.540" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.720" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.154" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="80.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 255.000 256.000 257.000 258.000 259.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 265.000 270.000 270.833 271.667 272.500 273.333 274.167 275.000 275.000 275.000 275.000 276.111 277.222 278.333 279.444 280.556 281.667 282.778 283.889 285.000 285.000 286.667 288.333 290.000 290.000 292.500 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 350.000 350.000 355.000 359.513 365.273 372.877 383.382 398.836 423.819 471.067 594.275
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 66 63 60 66 66 66 66 63 63 63 66 66 66 69 69 69 69 66 66 60 60 57 63 63 0 72 0 0 72 72 69 66 63 60 0 72 72 69 0 69 0 0 0 0 0 0 0 0 69 69 0 0 0 0 0 0 0 0 72 72 57 0 69 72 54 60 66 69 69 0 63 66 69 72 63 69 69 63 69 72 66 72 66 69 63 69 63 69 66 69 72 72 72 72 72 72 75 72 72 75 48 0 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.822 90.0 95.0 100.0 105.0 110.0 115.0 119.364 120.0 125.0 128.727 130.0 135.0 138.091 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 290.654 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.204 1.557 1.74 1.798 1.76 1.661 1.661 1.661 1.661 1.68 1.753 1.798 1.864 2.017 2.158 2.295 2.432 2.572 2.718 2.87 3.033 3.206 3.394 3.599 3.825 4.077 4.357 4.671 5.018 5.393 5.781 6.16 6.511 6.823 7.091 7.319 7.507 7.662 7.784 7.877 7.944 7.984 8.0 8.0 7.994 7.973 7.938 7.889 7.829 7.757 7.675 7.585 7.486 7.38 7.267 7.15 7.027 6.9 6.77 6.637 6.502 6.365 6.228 6.089 5.95 5.811 5.673 5.535 5.398 5.262 5.128 4.995 4.865 4.736 4.609 4.484 4.361 4.241 4.123 4.007 3.894 3.783 3.675 3.57 3.466 3.366 3.267 3.171 3.078 2.987 2.898 2.812 2.728 2.646 2.567 2.49 2.415 2.341 2.27 2.202 2.135 2.069 2.006 1.945 1.885 1.828 1.771 1.717 1.664 1.613 1.563 1.515 1.468 1.423 1.379 1.336 1.295 1.254 1.216 1.178 1.141 1.106 1.071 1.038 1.006 0.975 0.944 0.915 0.886 0.859 0.832 0.806 0.781 0.757 0.733 0.71 0.688 0.666 0.646 0.626 0.606 0.587 0.569 0.551 0.534 0.517 0.501 0.485 0.47 0.455 0.441 0.427 0.414 0.401 0.389 0.376 0.365 0.353 0.342 0.332 0.321 0.311 0.301 0.292 0.283 0.274 0.265 0.257 0.249 0.241 0.234 0.226 0.219 0.212 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.798" PeakHeight="110.0" Num="3" Error="0.0">
-28.731 10.669 -2.116
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.798" EndFrequency="8.0" PeakHeight="290.654" Num="5" zHalfNm="228.405" Error="3.81">
-142.001 -3.995 -12.489 5.598 0.324
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.091" Depth="0.137"/>
<TopsideChapman PeakHeight="290.654" PeakDensity="794044.7" PeakScaleHeight="49.154" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
