<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 14:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 75% PACIFIC flags: Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.01.26 (026) 14:00:00</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">
FF202602601261400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.707" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.011" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.315" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.325" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="316.792" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="217.318" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.947" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.386" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.677" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.312" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="180.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="58">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 340.000 345.000 350.000 365.000 365.000 365.000 365.000 366.667 368.333 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 387.500 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 425.000 430.000 430.000 435.000 440.000 440.000 440.000 440.000 443.883 448.112 452.734 457.808 463.402 469.601 476.508 484.254 492.999 502.951 514.378 527.635
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 54 48 51 0 57 57 54 0 0 54 51 51 51 51 57 54 0 60 54 54 45 51 60 63 57 63 63 60 63 60 63 60 63 57 60 0 54 48 60 54 48 60 60 60 60 57 57 57 57 57 57 60 48 0 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 -1.953125 -1.953125
</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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.861 113.723 115.0 115.584 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 316.792 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.23 2.869 3.207 3.315 3.192 3.192 3.276 3.315 3.469 3.635 3.792 3.941 4.084 4.222 4.355 4.485 4.612 4.737 4.86 4.983 5.104 5.225 5.345 5.466 5.586 5.708 5.83 5.953 6.077 6.203 6.33 6.459 6.59 6.723 6.858 6.995 7.135 7.278 7.422 7.568 7.716 7.863 8.007 8.146 8.273 8.38 8.458 8.497 8.5 8.498 8.489 8.472 8.447 8.416 8.378 8.333 8.283 8.228 8.167 8.101 8.031 7.957 7.879 7.798 7.714 7.626 7.536 7.444 7.35 7.254 7.157 7.058 6.958 6.857 6.755 6.653 6.55 6.447 6.344 6.24 6.137 6.035 5.932 5.83 5.729 5.628 5.528 5.428 5.33 5.232 5.135 5.04 4.945 4.851 4.759 4.668 4.578 4.489 4.401 4.315 4.23 4.146 4.063 3.982 3.902 3.823 3.745 3.669 3.594 3.521 3.449 3.377 3.308 3.239 3.172 3.106 3.041 2.977 2.915 2.854 2.794 2.735 2.677 2.62 2.565 2.51 2.457 2.404 2.353 2.303 2.254 2.205 2.158 2.112 2.066 2.022 1.978 1.936 1.894 1.853 1.813 1.774 1.736 1.698 1.661 1.625 1.59 1.555 1.522 1.489 1.456 1.425 1.394 1.363 1.334 1.305 1.276 1.248 1.221 1.194 1.168 1.143 1.118 1.094 1.07 1.046 1.023 1.001 0.979 0.958 0.937 0.916 0.896 0.877 0.857 0.839 0.82 0.802 0.785 0.768 0.751 0.734 0.718 0.702 0.687 0.672

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.315" PeakHeight="110.0" Num="3" Error="0.0">
-30.446 13.071 -3.13
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.315" EndFrequency="8.5" PeakHeight="316.792" Num="5" zHalfNm="217.318" Error="3.117">
-163.486 -54.67 17.257 0.42 -0.729
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.584" Depth="0.123"/>
<TopsideChapman PeakHeight="316.792" PeakDensity="896402.0" PeakScaleHeight="70.312" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
