<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-10 -283 18:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.10.10 (283) 18:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628310101800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.711" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.214" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.968" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.158" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="351.260" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="283.092" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.144" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.992" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.229" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.911" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.854 371.707 372.561 373.415 374.268 375.122 375.976 376.829 377.683 378.537 379.390 380.244 381.098 381.951 382.805 383.659 384.512 385.366 386.220 387.073 387.927 388.780 389.634 390.488 391.341 392.195 393.049 393.902 394.756 395.610 396.463 397.317 398.171 399.024 399.878 400.732 401.585 402.439 403.293 404.146 405.000 405.854 406.707 407.561 408.415 409.268 410.122 410.976 411.829 412.683 413.537 414.390 415.244 416.098 416.951 417.805 418.659 419.512 420.366 421.220 422.073 422.927 423.780 424.634 425.488 426.341 427.195 428.049 428.902 429.756 430.610 431.463 432.317 433.171 434.024 434.878 435.732 436.585 437.439 438.293 439.146 440.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 478.876 483.509 489.144 496.146 505.080 516.874
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 48 0 57 63 0 66 63 60 66 66 63 63 66 66 66 63 66 66 66 63 69 66 63 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 42 0 57 60 63 57 63 51 60 66 60 66 60 66 63 66 63 63 66 63 60 63 63 60 60 42
</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 1.953125 -0.390625 -0.390625 0.390625 -0.390625 1.171875 -1.171875 0.390625 -0.390625 -1.171875 1.171875 1.953125 -0.390625 -0.390625 -0.390625 2.734375 -2.734375 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -2.734375 -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 -1.171875 -0.390625 -0.390625 0.390625 0.390625 -2.734375 1.171875 -2.734375 -0.390625 1.171875 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.953125 1.953125 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" >
89.551 90.0 95.0 100.0 105.0 110.0 113.361 115.0 116.722 120.0 120.083 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 351.26 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.995 2.569 2.872 2.968 2.846 2.846 2.846 2.965 2.968 3.201 3.41 3.6 3.778 3.947 4.11 4.268 4.422 4.574 4.725 4.874 5.023 5.172 5.322 5.472 5.624 5.777 5.932 6.089 6.248 6.411 6.577 6.746 6.92 7.098 7.281 7.47 7.665 7.866 8.075 8.292 8.517 8.753 9.0 9.258 9.53 9.815 10.114 10.427 10.752 11.083 11.41 11.716 11.976 12.162 12.246 12.25 12.244 12.217 12.171 12.106 12.024 11.927 11.815 11.69 11.553 11.405 11.248 11.083 10.91 10.731 10.547 10.358 10.165 9.97 9.772 9.572 9.371 9.17 8.968 8.767 8.567 8.368 8.17 7.974 7.781 7.589 7.4 7.214 7.03 6.849 6.672 6.497 6.326 6.158 5.994 5.832 5.675 5.52 5.369 5.222 5.077 4.937 4.799 4.665 4.534 4.407 4.282 4.161 4.043 3.928 3.816 3.707 3.6 3.497 3.396 3.298 3.203 3.111 3.02 2.933 2.848 2.765 2.684 2.606 2.53 2.456 2.384 2.315 2.247 2.181 2.117 2.055 1.995 1.936 1.879 1.824 1.77 1.718 1.668 1.619 1.571 1.525 1.48 1.436 1.394 1.352 1.312 1.274 1.236 1.2 1.164 1.13 1.096 1.064 1.032 1.002 0.972 0.944 0.916 0.889 0.862 0.837 0.812 0.788 0.765 0.742 0.72 0.699 0.678 0.658 0.638 0.619 0.601 0.583 0.566 0.549 0.533 0.517 0.502 0.487 0.473 0.459 0.445 0.432 0.419 0.407

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.968" PeakHeight="110.0" Num="3" Error="0.0">
-30.168 12.663 -2.944
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.968" EndFrequency="12.25" PeakHeight="351.26" Num="5" zHalfNm="283.092" Error="3.273">
-175.399 -77.723 18.174 5.535 -1.764
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.083" Depth="0.122"/>
<TopsideChapman PeakHeight="351.26" PeakDensity="1861817.6" PeakScaleHeight="51.911" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
