<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 14:30:00.000"
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" >
2026.03.22 (081) 14:30:00</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">
FF202608103221430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.266" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.944" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="616.429" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.394" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.362" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="395.446" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.230" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.944" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="176.305" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="66.270" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.751" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="232.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.833 291.667 292.500 293.333 294.167 295.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 307.500 310.000 312.500 315.000 315.000 317.000 319.000 321.000 323.000 325.000 325.000 330.000 330.000 332.500 335.000 335.000 340.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 405.000 405.000 410.000 415.000 415.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 455.000 460.000 465.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 525.000 530.000 532.500 535.000 540.000 545.000 547.500 550.000 555.000 559.000 563.000 567.000 571.000 575.000 579.000 583.000 587.000 591.000 595.000 595.000 598.571 602.143 605.714 609.286 612.857 616.429 620.000 624.451 629.342 634.743 640.736 647.426 654.941 663.444 673.144
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 0 0 0 0 54 57 54 48 60 60 57 57 60 54 51 0 57 0 57 51 0 0 0 0 60 63 57 60 0 54 63 57 45 48 0 48 51 48 57 60 60 63 63 57 63 60 51 63 60 66 60 63 63 66 63 63 63 63 60 60 60 60 63 63 63 63 60 57 54 54 45 45 60 60 57 57 60 63 60 57 54 51 48 51 51 0 0 48 45 0 42 45 0 0 0 42 0 0 0 0 0 42 42 0 42 0 0 0 0 45 0 48 0 42 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.953125 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.953125 -1.171875 2.734375 0.390625 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 1.953125 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" >
89.483 90.0 95.0 100.0 105.0 110.0 111.532 113.065 114.597 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 395.446 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.283 2.937 3.283 3.394 3.271 3.271 3.394 3.407 3.562 3.704 3.842 3.979 4.118 4.26 4.408 4.562 4.722 4.89 5.066 5.249 5.438 5.631 5.826 6.022 6.217 6.408 6.596 6.778 6.955 7.127 7.294 7.456 7.613 7.766 7.916 8.061 8.203 8.343 8.479 8.613 8.745 8.876 9.004 9.131 9.256 9.381 9.505 9.628 9.75 9.872 9.994 10.116 10.238 10.36 10.483 10.606 10.73 10.854 10.979 11.101 11.22 11.329 11.413 11.45 11.45 11.447 11.439 11.424 11.403 11.378 11.346 11.31 11.269 11.223 11.173 11.118 11.06 10.998 10.932 10.862 10.79 10.714 10.636 10.555 10.472 10.386 10.298 10.208 10.116 10.023 9.928 9.831 9.734 9.635 9.535 9.435 9.333 9.231 9.128 9.025 8.921 8.817 8.713 8.609 8.505 8.4 8.296 8.192 8.089 7.985 7.882 7.779 7.677 7.575 7.474 7.373 7.273 7.174 7.075 6.977 6.88 6.783 6.688 6.593 6.499 6.406 6.313 6.222 6.131 6.042 5.953 5.865 5.779 5.693 5.608 5.524 5.441 5.359 5.278 5.198 5.119 5.041 4.964 4.888 4.813 4.739 4.666 4.593 4.522 4.452 4.383 4.314 4.247 4.18 4.115 4.05 3.986 3.923 3.861 3.8 3.74 3.681 3.622 3.564 3.508 3.452 3.397 3.342 3.289 3.236 3.184 3.133 3.083 3.033 2.984 2.936 2.889 2.842 2.796 2.751 2.707 2.663 2.62 2.577 2.535 2.494

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.394" PeakHeight="110.0" Num="3" Error="0.0">
-30.503 13.155 -3.169
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.394" EndFrequency="11.45" PeakHeight="395.446" Num="5" zHalfNm="256.23" Error="5.18">
-240.328 -67.211 42.1 -22.057 6.647
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.597" Depth="0.123"/>
<TopsideChapman PeakHeight="395.446" PeakDensity="1626581.9" PeakScaleHeight="93.751" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
