<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 21:50:00.000"
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="12.0">
<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, 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" >
2026.10.20 (293) 21:50:00</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">
FF202629310202150009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.088" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.181" 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="8.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="705.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="705.000" 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="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="730.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" 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="/" />
<URSI ID="92" Val="578.723" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="483.757" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.627" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="144.135" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.773" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.605" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.720" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="39">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
705.000 705.000 705.833 706.667 707.500 708.333 709.167 710.000 715.000 715.000 715.000 715.000 715.000 720.000 720.000 720.455 720.909 721.364 721.818 722.273 722.727 723.182 723.636 724.091 724.545 725.000 725.455 725.909 726.364 726.818 727.273 727.727 728.182 728.636 729.091 729.545 730.000 730.000 744.495
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 0 0 0 0 51 45 42 0 54 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 39 39 39
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 1.171875 -0.390625 -1.171875 -0.390625 -1.171875 1.953125 -1.171875 -2.734375 1.953125 2.734375 -2.734375 1.953125 -1.171875 2.734375 -1.953125 -1.171875 1.171875 -1.171875 1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.149 145.0 150.0 155.0 160.0 165.0 170.0 172.297 175.0 180.0 185.0 190.0 195.0 200.0 203.446 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 578.723 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.265 0.215 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.238 0.263 0.288 0.312 0.337 0.354 0.38 0.432 0.474 0.514 0.553 0.593 0.634 0.677 0.722 0.77 0.82 0.874 0.931 0.992 1.057 1.126 1.2 1.278 1.36 1.446 1.537 1.63 1.726 1.825 1.926 2.029 2.133 2.239 2.345 2.452 2.559 2.667 2.775 2.884 2.993 3.102 3.211 3.321 3.431 3.541 3.652 3.763 3.874 3.986 4.099 4.212 4.326 4.44 4.555 4.671 4.788 4.906 5.025 5.144 5.265 5.388 5.511 5.636 5.762 5.889 6.018 6.149 6.281 6.415 6.55 6.686 6.823 6.961 7.098 7.234 7.365 7.489 7.598 7.684 7.738 7.75 7.75 7.744 7.73 7.71 7.682 7.648 7.608 7.562 7.511 7.455 7.394 7.329 7.261 7.188 7.112 7.033 6.952 6.868 6.782 6.694 6.604 6.512 6.42 6.326 6.232 6.136 6.041 5.945 5.848 5.752 5.655 5.559 5.463 5.368 5.272 5.178 5.084 4.991 4.898 4.807 4.716 4.626 4.537 4.45 4.363 4.277 4.193 4.11 4.028 3.947 3.867 3.788 3.711 3.635 3.56 3.486 3.414 3.343 3.273 3.204 3.137 3.071 3.006 2.942 2.879 2.818 2.757 2.698 2.64 2.583 2.527 2.473 2.419 2.367 2.315 2.265 2.215 2.167 2.12 2.073 2.028 1.983 1.94 1.897 1.855

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.75" PeakHeight="578.723" Num="5" zHalfNm="483.757" Error="13.896">
-334.153 -79.832 54.68 -26.73 10.758
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.446" Depth="0.154"/>
<TopsideChapman PeakHeight="578.723" PeakDensity="745192.3" PeakScaleHeight="68.605" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
