<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 14:10:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.22 (081) 14:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608103221410009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.434" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.358" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.250" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.310" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.137" Name="h`E" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="556.667" 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="3.376" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.354" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="365.887" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.726" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.773" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.295" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.090" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.429" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="192.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.250" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 312.500 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 328.333 331.667 335.000 335.000 336.667 338.333 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 362.500 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 405.000 405.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 455.000 455.000 460.000 460.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 495.000 495.000 500.000 505.000 508.750 512.500 516.250 520.000 515.000 518.333 521.667 525.000 530.000 535.000 540.000 540.000 540.000 545.000 550.000 553.333 556.667 560.000 564.710 569.963 575.857 582.518 590.106 598.830 608.964
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 51 0 0 0 48 51 54 45 0 51 57 0 57 51 0 54 0 0 0 0 0 0 51 60 60 51 0 63 66 60 57 0 0 45 51 0 0 60 69 63 72 60 66 57 60 66 66 69 0 51 57 51 51 63 60 63 63 63 63 60 66 66 60 63 60 60 69 63 60 69 69 63 72 72 69 72 69 63 66 63 60 51 57 45 48 48 48 54 57 54 57 51 0 57 0 42 0 42 42 0 0 42 51 0 48 54 42 0 51 0 0 45 48 0 48 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 1.953125 0.390625 -1.171875 0.390625 -0.390625 0.390625 1.171875 -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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.25 3.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.137 106.557
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.609 113.217 114.826 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.887 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.227 2.865 3.202 3.31 3.19 3.19 3.31 3.318 3.515 3.686 3.848 4.006 4.166 4.327 4.493 4.665 4.842 5.025 5.214 5.409 5.608 5.81 6.014 6.218 6.422 6.623 6.822 7.017 7.209 7.396 7.58 7.761 7.937 8.111 8.281 8.448 8.613 8.776 8.936 9.095 9.252 9.407 9.562 9.716 9.869 10.021 10.174 10.326 10.478 10.63 10.783 10.935 11.086 11.234 11.376 11.504 11.603 11.649 11.65 11.647 11.636 11.616 11.589 11.554 11.512 11.464 11.409 11.348 11.281 11.209 11.132 11.05 10.963 10.873 10.778 10.68 10.579 10.475 10.368 10.259 10.147 10.034 9.918 9.801 9.682 9.563 9.442 9.32 9.198 9.075 8.952 8.828 8.705 8.581 8.458 8.334 8.211 8.089 7.967 7.845 7.724 7.604 7.485 7.366 7.249 7.132 7.017 6.902 6.789 6.676 6.565 6.455 6.347 6.239 6.133 6.028 5.925 5.822 5.721 5.622 5.523 5.427 5.331 5.237 5.144 5.052 4.962 4.873 4.786 4.7 4.615 4.532 4.449 4.368 4.289 4.211 4.134 4.058 3.983 3.91 3.838 3.767 3.697 3.629 3.562 3.495 3.43 3.367 3.304 3.242 3.181 3.122 3.063 3.006 2.95 2.894 2.84 2.786 2.734 2.682 2.632 2.582 2.533 2.485 2.438 2.392 2.347 2.302 2.259 2.216 2.174 2.132 2.092 2.052 2.013 1.975 1.937 1.9 1.864 1.829 1.794 1.759 1.726 1.693 1.661 1.629

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.31" PeakHeight="110.0" Num="3" Error="0.0">
-30.443 13.065 -3.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.31" EndFrequency="11.65" PeakHeight="365.887" Num="5" zHalfNm="248.726" Error="4.738">
-214.031 -59.993 33.048 -15.203 5.118
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.826" Depth="0.12"/>
<TopsideChapman PeakHeight="365.887" PeakDensity="1683902.0" PeakScaleHeight="80.429" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
