<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 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="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.23 (082) 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">
FF202608203231410009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.594" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.682" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.550" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="3.376" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.354" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="333.111" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.484" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.773" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="132.200" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.371" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.233" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="176.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="92">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.833 301.667 302.500 303.333 304.167 305.000 310.000 310.000 310.000 312.143 314.286 316.429 318.571 320.714 322.857 325.000 327.143 329.286 331.429 333.571 335.714 337.857 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 365.000 365.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 440.000 445.000 445.000 455.000 455.000 460.000 460.000 470.000 475.000 475.000 480.000 480.000 490.000 493.190 496.714 500.628 505.000 509.916 515.484 521.842 529.172 537.716 547.801 559.887
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 63 0 57 51 45 48 57 0 0 0 0 0 54 54 48 45 0 0 0 51 0 0 0 51 0 51 0 0 0 57 51 54 48 51 54 51 54 48 0 54 54 57 0 48 57 51 57 51 60 54 60 57 60 57 60 57 57 57 54 51 57 54 51 57 57 57 57 60 57 54 57 57 57 54 48 57 54 54 51 48 51 51 51 51 51 48 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 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -2.734375 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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 128.750 127.500 126.250 125.000 125.000 125.000 125.000 125.000 125.000 124.167 123.333 122.500 121.667 120.833 120.000 120.000 120.000 120.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 0 45 0 51 51 54 54 0 54 0 57 0 54 48 51 51 57 0 57 54 60 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 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" >
89.486 90.0 95.0 100.0 105.0 110.0 111.609 113.219 114.828 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.111 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.271 2.922 3.266 3.376 3.253 3.253 3.376 3.383 3.573 3.736 3.89 4.038 4.185 4.333 4.481 4.632 4.785 4.942 5.1 5.262 5.425 5.59 5.757 5.924 6.092 6.259 6.426 6.592 6.757 6.92 7.082 7.242 7.4 7.557 7.713 7.867 8.02 8.172 8.323 8.473 8.622 8.77 8.918 9.064 9.209 9.351 9.489 9.62 9.737 9.832 9.889 9.9 9.899 9.892 9.876 9.852 9.821 9.783 9.738 9.687 9.629 9.566 9.498 9.425 9.347 9.265 9.179 9.09 8.997 8.901 8.803 8.702 8.598 8.493 8.386 8.278 8.168 8.057 7.946 7.833 7.72 7.607 7.493 7.379 7.265 7.151 7.038 6.925 6.812 6.7 6.589 6.478 6.368 6.259 6.151 6.043 5.937 5.832 5.728 5.625 5.524 5.423 5.324 5.226 5.129 5.034 4.94 4.847 4.755 4.665 4.577 4.489 4.403 4.318 4.235 4.153 4.072 3.993 3.915 3.838 3.763 3.689 3.616 3.544 3.474 3.405 3.337 3.271 3.205 3.141 3.078 3.016 2.956 2.896 2.838 2.78 2.724 2.669 2.615 2.562 2.51 2.459 2.409 2.36 2.311 2.264 2.218 2.173 2.128 2.085 2.042 2.0 1.959 1.919 1.879 1.841 1.803 1.766 1.729 1.694 1.659 1.625 1.591 1.558 1.526 1.495 1.464 1.433 1.404 1.375 1.346 1.319 1.291 1.265 1.238 1.213 1.188 1.163 1.139 1.115 1.092 1.069 1.047 1.026 1.004 0.983

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.376" PeakHeight="110.0" Num="3" Error="0.0">
-30.49 13.136 -3.16
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.376" EndFrequency="9.9" PeakHeight="333.111" Num="5" zHalfNm="227.484" Error="4.235">
-182.608 -52.772 21.578 -7.3 2.819
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.828" Depth="0.123"/>
<TopsideChapman PeakHeight="333.111" PeakDensity="1216005.0" PeakScaleHeight="74.233" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
