<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 22:30:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.03.26 (085) 22:30:00</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">
FF202608503262230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.421" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.304" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="465.752" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="397.098" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.428" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="102.312" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.473" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.472" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="117">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 370.000 370.000 370.000 375.000 381.000 387.000 393.000 399.000 405.000 405.000 405.000 405.000 405.000 405.000 406.667 408.333 410.000 411.667 413.333 415.000 415.000 415.000 420.000 417.500 415.000 420.000 421.667 423.333 425.000 420.000 430.000 430.000 430.000 430.000 430.000 430.000 430.000 430.000 425.000 427.500 430.000 435.000 435.000 437.500 440.000 440.000 440.000 440.000 440.000 445.000 447.500 450.000 450.000 445.000 447.500 450.000 450.000 452.500 455.000 456.538 458.077 459.615 461.154 462.692 464.231 465.769 467.308 468.846 470.385 471.923 473.462 475.000 475.000 475.000 477.500 480.000 480.000 480.000 485.000 485.000 485.000 490.000 490.000 490.000 491.667 493.333 495.000 497.826 500.652 503.478 506.304 509.130 511.957 514.783 517.609 520.435 523.261 526.087 528.913 531.739 534.565 537.391 540.217 543.043 545.870 548.696 551.522 554.348 557.174 560.000 568.447 577.806 588.230 599.915 613.102 628.102
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 0 60 57 0 0 0 0 66 66 0 69 72 69 0 57 0 0 0 57 63 63 63 66 66 63 54 0 0 60 57 60 0 0 0 0 0 0 54 0 57 60 63 0 63 66 63 0 54 57 0 63 75 63 69 72 69 66 72 0 69 0 66 72 0 63 0 0 0 60 0 60 54 60 0 66 69 63 66 66 66 66 63 66 0 0 63 66 0 72 66 0 63 69 63 69 63 66 60 69 60 69 54 48 66 60 66 63 63 63 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 -0.390625 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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -2.734375 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 1.953125 2.734375 1.953125 -2.734375 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.673 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.345 180.0 185.0 190.0 195.0 200.0 205.0 208.018 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 465.752 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.306 0.275 0.231 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.246 0.269 0.293 0.316 0.34 0.354 0.377 0.437 0.502 0.572 0.647 0.728 0.813 0.904 0.999 1.1 1.206 1.316 1.432 1.553 1.679 1.811 1.948 2.09 2.237 2.39 2.549 2.713 2.883 3.059 3.24 3.427 3.62 3.82 4.024 4.235 4.452 4.674 4.903 5.136 5.375 5.618 5.865 6.116 6.37 6.625 6.88 7.133 7.383 7.625 7.857 8.074 8.272 8.446 8.591 8.701 8.771 8.8 8.8 8.794 8.773 8.738 8.689 8.628 8.556 8.473 8.381 8.281 8.173 8.058 7.937 7.811 7.68 7.546 7.408 7.268 7.126 6.982 6.837 6.691 6.546 6.4 6.254 6.109 5.965 5.823 5.681 5.541 5.403 5.267 5.133 5.0 4.87 4.743 4.617 4.494 4.373 4.255 4.14 4.026 3.916 3.807 3.702 3.598 3.497 3.399 3.303 3.209 3.118 3.029 2.943 2.858 2.776 2.696 2.618 2.543 2.469 2.397 2.327 2.26 2.194 2.129 2.067 2.007 1.948 1.89 1.835 1.781 1.728 1.677 1.628 1.58 1.533 1.488 1.444 1.401 1.359 1.319 1.28 1.242 1.205 1.169 1.135 1.101 1.068 1.036 1.006 0.976 0.947 0.918 0.891 0.865 0.839 0.814 0.789 0.766 0.743 0.721 0.699 0.679 0.658 0.639 0.62 0.601 0.583 0.566

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.8" PeakHeight="465.752" Num="5" zHalfNm="397.098" Error="1.972">
-238.814 -34.893 19.671 -4.123 0.425
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.018" Depth="0.154"/>
<TopsideChapman PeakHeight="465.752" PeakDensity="960794.06" PeakScaleHeight="51.472" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
