<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 17:40:00.000"
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="15.0">
<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: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.10.15 (288) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628810151740009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.932" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.527" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.512" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.051" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.199" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="267.507" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="176.026" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.044" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.892" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.899" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.840" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 372.500 375.000 375.000 380.000 380.000 385.000 387.500 390.000 395.000 397.500 400.000 400.000 405.000 407.203 409.716 412.612 415.983 419.958 424.716 430.512 437.728
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 60 66 63 0 63 0 0 63 54 66 72 69 69 66 63 69 63 60 57 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 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" >
89.537 90.0 95.0 100.0 105.0 110.0 112.991 115.0 115.983 118.974 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 267.507 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.051 2.641 2.952 3.051 2.929 2.929 2.929 3.051 3.083 3.243 3.409 3.582 3.762 3.945 4.125 4.301 4.469 4.628 4.778 4.921 5.057 5.187 5.312 5.432 5.549 5.662 5.774 5.883 5.991 6.098 6.204 6.311 6.419 6.529 6.641 6.756 6.874 6.979 7.0 6.999 6.99 6.972 6.945 6.911 6.87 6.822 6.767 6.707 6.642 6.572 6.497 6.419 6.337 6.252 6.164 6.073 5.981 5.886 5.79 5.693 5.595 5.496 5.397 5.297 5.197 5.097 4.998 4.898 4.8 4.701 4.604 4.507 4.412 4.317 4.224 4.131 4.04 3.95 3.861 3.774 3.688 3.603 3.52 3.439 3.358 3.279 3.202 3.126 3.052 2.979 2.907 2.837 2.769 2.702 2.636 2.572 2.509 2.447 2.387 2.328 2.27 2.214 2.159 2.105 2.053 2.002 1.952 1.903 1.855 1.809 1.763 1.719 1.675 1.633 1.592 1.552 1.512 1.474 1.437 1.4 1.364 1.33 1.296 1.263 1.231 1.199 1.169 1.139 1.11 1.082 1.054 1.027 1.001 0.975 0.95 0.926 0.902 0.879 0.857 0.835 0.813 0.792 0.772 0.752 0.733 0.714 0.696 0.678 0.66 0.643 0.627 0.611 0.595 0.58 0.565 0.55 0.536 0.522 0.509 0.496 0.483 0.471 0.459 0.447 0.435 0.424 0.413 0.403 0.392 0.382 0.372 0.363 0.353 0.344 0.335 0.327 0.318 0.31 0.302 0.294 0.287 0.279 0.272 0.265 0.258 0.252

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.051" PeakHeight="110.0" Num="3" Error="0.0">
-30.237 12.764 -2.99
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.051" EndFrequency="7.0" PeakHeight="267.507" Num="5" zHalfNm="176.026" Error="2.48">
-121.444 -44.512 25.571 -9.905 1.757
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.974" Depth="0.122"/>
<TopsideChapman PeakHeight="267.507" PeakDensity="607940.44" PeakScaleHeight="59.84" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
