<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 17:30:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.25 (084) 17:30:00</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">
FF202608403251730009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.669" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.695" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.166" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.255" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="347.735" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.734" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.256" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="118.729" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.697" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.974" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="152.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<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 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 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 220.000 220.000 224.500 229.000 233.500 238.000 242.500 247.000 251.500 256.000 260.500 265.000 265.000 270.000 275.000 277.500 280.000 275.000 278.333 281.667 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 312.500 315.000 315.000 315.000 318.000 321.000 324.000 327.000 330.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 350.000 352.500 355.000 355.000 357.500 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 426.667 428.333 430.000 430.000 430.000 435.000 437.500 440.000 440.000 440.000 445.000 450.000 450.000 452.500 455.000 457.500 460.000 460.000 462.500 465.000 470.000 480.000 480.000 485.000 490.000 496.426 503.898 512.696 523.207 535.985 551.852 572.082
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 45 0 0 0 0 0 0 0 0 0 45 45 0 45 0 45 54 0 0 51 0 0 63 63 60 63 66 63 63 66 66 63 66 66 0 63 0 63 0 0 60 0 63 63 60 0 0 0 0 48 57 0 0 0 0 0 51 60 0 54 60 63 66 60 66 66 60 69 66 0 69 57 63 69 57 63 66 57 63 66 54 60 63 63 60 63 63 63 66 60 63 66 60 60 66 51 63 0 51 57 0 57 60 57 60 63 63 60 63 63 60 57 0 0 57 0 57 54 0 51 54 51 0 48 54 0 51 48 54 51 0 51 48 45 51 51 0 51 0 0 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 -0.390625 -1.953125 2.734375 -1.953125 -1.953125 -1.171875 -2.734375 -2.734375 -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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 -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 1.953125 -2.734375 2.734375 2.734375 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" >
89.518 90.0 95.0 100.0 105.0 110.0 112.491 114.981 115.0 117.472 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.735 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.129 2.74 3.063 3.166 3.044 3.044 3.045 3.166 3.236 3.374 3.515 3.657 3.803 3.951 4.102 4.256 4.414 4.575 4.74 4.908 5.079 5.254 5.433 5.614 5.799 5.987 6.178 6.372 6.568 6.768 6.969 7.174 7.381 7.59 7.801 8.014 8.23 8.447 8.666 8.886 9.108 9.33 9.553 9.776 9.999 10.219 10.435 10.645 10.846 11.033 11.199 11.337 11.438 11.492 11.5 11.499 11.487 11.463 11.427 11.381 11.325 11.259 11.185 11.102 11.011 10.914 10.81 10.7 10.584 10.464 10.339 10.21 10.077 9.941 9.803 9.662 9.519 9.374 9.228 9.081 8.933 8.785 8.636 8.487 8.339 8.19 8.042 7.895 7.749 7.603 7.459 7.316 7.174 7.034 6.895 6.758 6.622 6.488 6.356 6.226 6.097 5.97 5.845 5.723 5.602 5.483 5.366 5.251 5.138 5.027 4.918 4.811 4.706 4.603 4.501 4.402 4.305 4.209 4.116 4.024 3.934 3.846 3.76 3.675 3.592 3.511 3.432 3.354 3.278 3.204 3.131 3.06 2.99 2.922 2.855 2.79 2.726 2.663 2.602 2.542 2.484 2.427 2.371 2.316 2.263 2.21 2.159 2.11 2.061 2.013 1.966 1.921 1.876 1.833 1.79 1.749 1.708 1.669 1.63 1.592 1.555 1.519 1.483 1.449 1.415 1.382 1.35 1.319 1.288 1.258 1.229 1.2 1.172 1.145 1.118 1.092 1.066 1.042 1.017 0.993 0.97 0.948 0.926 0.904 0.883 0.862

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.166" PeakHeight="110.0" Num="3" Error="0.0">
-30.331 12.901 -3.052
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.166" EndFrequency="11.5" PeakHeight="347.735" Num="5" zHalfNm="257.734" Error="2.484">
-187.77 -53.261 12.985 -2.871 0.654
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.472" Depth="0.122"/>
<TopsideChapman PeakHeight="347.735" PeakDensity="1640818.9" PeakScaleHeight="65.974" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
