<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 18:20:00.000"
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" >
2026.03.07 (066) 18:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603071820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.508" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.706" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" 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="2.989" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.168" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="366.843" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.278" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.473" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="130.831" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.799" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.957" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 224.167 228.333 232.500 236.667 240.833 245.000 250.000 255.000 258.333 261.667 265.000 270.000 272.500 275.000 275.000 280.000 280.000 280.000 285.000 290.000 295.000 295.000 295.000 300.000 305.000 305.000 310.000 310.000 310.000 310.000 312.500 315.000 325.000 327.500 330.000 325.000 330.000 330.000 335.000 337.500 340.000 345.000 345.000 348.333 351.667 355.000 355.000 355.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 415.000 420.000 422.500 425.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 470.000 470.000 470.000 472.500 475.000 480.000 480.000 482.500 485.000 487.500 490.000 492.500 495.000 500.000 500.000 505.000 510.000 510.000 515.000 520.000 522.500 525.000 530.000 532.500 535.000 540.490 546.956 554.684 564.084 575.764 590.666
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 57 0 54 0 48 51 54 0 0 54 51 0 45 51 57 57 48 0 57 54 57 54 0 57 60 54 60 0 63 0 0 51 0 51 57 60 57 57 0 57 48 57 0 0 45 54 60 54 0 54 60 51 57 57 51 57 57 57 63 57 60 48 57 63 63 63 63 57 60 51 54 45 51 0 51 57 63 60 0 57 63 54 63 57 63 63 66 66 63 51 60 63 60 63 60 63 0 45 51 60 0 60 51 57 0 0 0 57 0 57 51 54 51 45 54 51 45 0 48 45 0 45 0 45 45 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 -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 -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 -1.171875 -0.390625 1.171875 -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 -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 0.390625 0.390625 -2.734375 -0.390625 -2.734375 -1.953125 1.171875 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" >
89.547 90.0 95.0 100.0 105.0 110.0 113.267 115.0 116.533 119.8 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.843 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.009 2.587 2.892 2.989 2.867 2.867 2.867 2.989 2.994 3.115 3.241 3.374 3.513 3.657 3.805 3.957 4.113 4.272 4.432 4.594 4.757 4.921 5.085 5.249 5.413 5.576 5.74 5.903 6.066 6.228 6.39 6.552 6.713 6.875 7.036 7.198 7.36 7.522 7.684 7.847 8.011 8.175 8.34 8.506 8.673 8.842 9.011 9.181 9.353 9.525 9.698 9.869 10.039 10.203 10.356 10.491 10.593 10.646 10.65 10.648 10.637 10.617 10.587 10.55 10.504 10.451 10.391 10.324 10.251 10.172 10.087 9.998 9.904 9.806 9.704 9.598 9.49 9.378 9.264 9.147 9.029 8.909 8.787 8.664 8.54 8.415 8.289 8.163 8.037 7.911 7.784 7.658 7.532 7.407 7.282 7.158 7.035 6.912 6.791 6.67 6.551 6.432 6.315 6.199 6.085 5.972 5.86 5.749 5.64 5.533 5.427 5.322 5.219 5.117 5.017 4.919 4.822 4.727 4.633 4.541 4.45 4.361 4.273 4.187 4.102 4.019 3.937 3.857 3.778 3.701 3.625 3.55 3.477 3.406 3.335 3.266 3.198 3.132 3.067 3.003 2.94 2.879 2.819 2.76 2.702 2.645 2.59 2.535 2.482 2.43 2.379 2.328 2.279 2.231 2.184 2.138 2.092 2.048 2.005 1.962 1.921 1.88 1.84 1.801 1.763 1.725 1.688 1.652 1.617 1.583 1.549 1.516 1.484 1.452 1.421 1.391 1.361 1.332 1.304 1.276 1.248 1.222 1.196 1.17 1.145 1.121

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.989" PeakHeight="110.0" Num="3" Error="0.0">
-30.186 12.689 -2.956
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.989" EndFrequency="10.65" PeakHeight="366.843" Num="5" zHalfNm="265.278" Error="2.893">
-201.235 -64.487 25.479 -7.471 0.671
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.8" Depth="0.122"/>
<TopsideChapman PeakHeight="366.843" PeakDensity="1407227.0" PeakScaleHeight="71.957" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
