<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 16:50:00.000"
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 1 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.27 (086) 16:50:00</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">
FF202608603271650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.675" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.122" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.689" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.325" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.224" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.278" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.308" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="343.057" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="172.426" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.841" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.033" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.156" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="54.337" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.753" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.946" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.280" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.180" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.55 11.6 11.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 280.000 280.000 280.000 280.000 281.111 282.222 283.333 284.444 285.556 286.667 287.778 288.889 290.000 290.000 292.500 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 305.000 307.500 310.000 310.000 310.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 332.500 335.000 335.000 335.000 340.000 340.000 340.000 342.500 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 407.500 410.000 415.000 415.000 415.000 415.000 420.000 421.667 423.333 425.000 426.667 428.333 430.000 435.000 435.000 435.000 437.500 440.000 440.000 440.000 440.000 440.000 445.000 445.000 447.500 450.000 452.420 455.072 457.993 461.224 464.820 468.843 473.377 478.525 484.420 491.237 499.212 508.667 520.056 534.040 551.619 574.386
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 48 0 54 51 0 48 0 0 0 0 0 0 48 51 0 51 54 54 54 51 0 57 51 54 0 57 57 60 0 48 57 0 60 60 63 63 60 60 63 0 63 66 63 60 63 63 0 60 51 0 60 51 54 63 63 63 63 0 63 66 57 63 63 57 60 57 51 60 51 60 63 54 60 66 54 63 66 60 63 66 54 0 0 0 0 51 45 0 57 60 60 60 57 60 0 0 0 0 0 57 45 51 54 0 54 54 54 0 0 51 51 51 0 0 0 51 0 48 0 54 0 48 48 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 0.390625 -0.390625 0.390625 -0.390625 2.734375 -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 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 -2.734375 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 235.000 242.000 249.000 256.000 263.000 270.000 275.000 275.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 48 0 0 51 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.953125 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.5 90.0 95.0 100.0 105.0 110.0 112.015 114.031 115.0 116.046 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 172.426 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 343.057 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.205 2.837 3.171 3.278 3.156 3.156 3.215 3.278 3.471 3.705 3.932 4.138 4.318 4.475 4.616 4.746 4.87 4.989 5.098 5.122 5.211 5.388 5.57 5.755 5.944 6.137 6.331 6.529 6.728 6.929 7.133 7.338 7.545 7.754 7.964 8.177 8.391 8.607 8.825 9.045 9.266 9.489 9.713 9.937 10.16 10.382 10.6 10.812 11.015 11.203 11.37 11.508 11.609 11.665 11.675 11.674 11.663 11.64 11.606 11.561 11.506 11.442 11.369 11.287 11.198 11.102 10.999 10.89 10.776 10.657 10.533 10.405 10.273 10.138 10.001 9.861 9.718 9.574 9.429 9.282 9.134 8.986 8.837 8.688 8.54 8.391 8.243 8.095 7.948 7.802 7.657 7.513 7.371 7.229 7.089 6.951 6.814 6.679 6.546 6.414 6.284 6.156 6.03 5.905 5.783 5.662 5.544 5.427 5.312 5.199 5.089 4.98 4.873 4.768 4.665 4.564 4.465 4.367 4.272 4.178 4.086 3.996 3.908 3.822 3.737 3.654 3.573 3.493 3.415 3.339 3.264 3.191 3.12 3.05 2.981 2.914 2.848 2.784 2.721 2.659 2.599 2.54 2.483 2.426 2.371 2.317 2.265 2.213 2.163 2.114 2.065 2.018 1.972 1.927 1.883 1.84 1.798 1.757 1.717 1.677 1.639 1.601 1.565 1.529 1.494 1.46 1.426 1.393 1.361 1.33 1.3 1.27 1.241 1.212 1.184 1.157 1.13 1.104 1.079 1.054 1.03 1.006 0.983 0.96 0.938 0.917 0.896

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.278" PeakHeight="110.0" Num="3" Error="0.0">
-30.418 13.029 -3.111
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.278" EndFrequency="5.122" PeakHeight="172.426" Num="5" Error="0.0">
-47.452 -14.234 7.594 -2.938 0.65
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.122" EndFrequency="11.675" PeakHeight="343.057" Num="5" zHalfNm="251.841" Error="3.416">
-139.88 -36.377 6.442 -0.696 -0.12
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.046" Depth="0.122"/>
<TopsideChapman PeakHeight="343.057" PeakDensity="1691136.8" PeakScaleHeight="66.946" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
