<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 13:00:00.000"
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="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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.18 (291) 13:00:00</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">
FF202629110181300009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.388" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.593" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="551.802" 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="3.288" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.313" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="387.656" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.439" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.113" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="180.092" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.247" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="99.668" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="216.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 335.000 340.000 340.000 340.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 362.500 365.000 368.663 372.326 375.988 379.651 383.314 386.977 390.640 394.302 397.965 401.628 405.291 408.953 412.616 416.279 419.942 423.605 427.267 430.930 434.593 438.256 441.919 445.581 449.244 452.907 456.570 460.232 463.895 467.558 471.221 474.884 478.546 482.209 485.872 489.535 493.198 496.860 500.523 504.186 507.849 511.511 515.174 518.837 522.500 526.163 529.825 533.488 537.151 540.814 544.477 548.139 551.802 555.465 559.128 565.000 575.000 585.000 595.000 610.000 625.000 645.000 670.000 700.000 743.683
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 48 51 54 60 60 63 63 63 60 63 63 63 60 63 66 63 63 66 66 63 66 63 63 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 2.734375 -0.390625 0.390625 -2.734375 1.953125 -1.171875 1.953125 1.953125 1.953125 1.171875 -2.734375 1.953125 -1.171875 1.171875 2.734375 -0.390625 2.734375 1.953125 -0.390625 -1.953125 -2.734375 -2.734375 0.390625 -0.390625 1.171875 -2.734375 1.171875 0.390625 1.953125 -1.171875 -2.734375 2.734375 -1.953125 -0.390625 1.171875 -0.390625 -1.171875 -1.171875 1.953125 -0.390625 1.953125 1.953125 2.734375 -1.171875 -0.390625 1.171875 -2.734375 0.390625 -0.390625 2.734375 -2.734375 2.734375 -1.171875 -2.734375 -2.734375 2.734375 0.390625 1.953125 1.171875
</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" >
89.499 90.0 95.0 100.0 105.0 110.0 111.97 113.94 115.0 115.91 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 387.656 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.212 2.846 3.181 3.288 3.166 3.166 3.232 3.288 3.42 3.572 3.72 3.864 4.008 4.151 4.294 4.438 4.583 4.728 4.875 5.023 5.171 5.321 5.471 5.621 5.772 5.923 6.074 6.225 6.376 6.527 6.677 6.826 6.975 7.123 7.27 7.417 7.562 7.707 7.851 7.993 8.134 8.274 8.413 8.55 8.686 8.82 8.952 9.082 9.209 9.333 9.454 9.571 9.684 9.79 9.89 9.983 10.066 10.139 10.201 10.248 10.281 10.298 10.3 10.299 10.295 10.285 10.271 10.252 10.229 10.201 10.17 10.135 10.096 10.054 10.008 9.959 9.907 9.852 9.794 9.734 9.671 9.606 9.539 9.47 9.398 9.325 9.25 9.174 9.096 9.017 8.937 8.856 8.773 8.69 8.605 8.521 8.435 8.349 8.262 8.175 8.087 8.0 7.912 7.824 7.735 7.647 7.559 7.471 7.383 7.295 7.207 7.12 7.033 6.946 6.86 6.774 6.689 6.604 6.519 6.435 6.352 6.269 6.186 6.105 6.024 5.943 5.864 5.785 5.706 5.629 5.552 5.476 5.4 5.326 5.252 5.178 5.106 5.034 4.963 4.893 4.824 4.755 4.688 4.621 4.554 4.489 4.424 4.36 4.297 4.235 4.173 4.112 4.052 3.993 3.934 3.877 3.82 3.763 3.708 3.653 3.599 3.545 3.493 3.441 3.389 3.339 3.289 3.24 3.191 3.143 3.096 3.05 3.004 2.958 2.914 2.87 2.826 2.784 2.742 2.7 2.659 2.619 2.579 2.54 2.501 2.463

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.288" PeakHeight="110.0" Num="3" Error="0.0">
-30.426 13.041 -3.116
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.288" EndFrequency="10.3" PeakHeight="387.656" Num="5" zHalfNm="250.439" Error="3.147">
-248.105 -37.112 16.46 -4.388 1.399
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.91" Depth="0.122"/>
<TopsideChapman PeakHeight="387.656" PeakDensity="1316253.1" PeakScaleHeight="99.668" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
