<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 22:10:00.000"
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 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" >
2026.03.28 (087) 22:10:00</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">
FF202608703282210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.422" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.191" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="464.082" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="401.010" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.685" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.646" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.847" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.210" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 370.000 375.000 380.000 385.000 390.000 400.000 410.000 420.000 430.000 425.000 385.000 402.500 420.000 427.500 435.000 435.000 434.167 433.333 432.500 431.667 430.833 430.000 425.000 425.000 422.500 420.000 420.556 421.111 421.667 422.222 422.778 423.333 423.889 424.444 425.000 425.556 426.111 426.667 427.222 427.778 428.333 428.889 429.444 430.000 430.556 431.111 431.667 432.222 432.778 433.333 433.889 434.444 435.000 435.556 436.111 436.667 437.222 437.778 438.333 438.889 439.444 440.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 450.000 451.667 453.333 455.000 455.000 455.000 460.000 460.000 462.500 465.000 467.500 470.000 472.500 475.000 475.000 470.000 475.000 475.000 485.000 485.000 486.250 487.500 488.750 490.000 490.000 495.000 495.000 500.000 505.000 505.000 510.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 530.000 540.000 545.000 545.000 550.000 555.000 560.000 565.000 570.000 575.000 585.000 600.922 626.656
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 66 66 0 0 54 51 0 0 60 0 54 54 0 0 0 0 0 60 60 57 0 57 0 54 0 0 0 0 0 69 72 0 0 69 63 66 60 63 69 66 0 0 72 57 0 66 60 0 66 66 66 0 51 0 54 72 0 60 63 72 60 75 72 72 69 72 0 0 66 69 0 0 66 66 69 66 66 51 66 0 60 57 57 57 69 66 69 54 57 0 0 0 72 78 72 75 69 60 75 72 72 60 63 75 78 78 78 75 72 72 75 75 72 72 69 69 69 57 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 1.171875 -0.390625 -1.171875 -1.171875 -1.171875 0.390625 1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 1.171875 -1.953125 -1.171875 1.171875 -1.953125 -1.953125 1.171875 -1.953125 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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 -1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 1.171875 0.390625 -1.953125 0.390625 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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 0.390625
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.417 145.0 150.0 155.0 160.0 165.0 170.0 172.834 175.0 180.0 185.0 190.0 195.0 200.0 204.251 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 464.082 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.325 0.301 0.267 0.218 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.235 0.26 0.284 0.309 0.333 0.354 0.36 0.408 0.466 0.531 0.602 0.678 0.756 0.837 0.921 1.006 1.094 1.184 1.278 1.374 1.473 1.576 1.683 1.794 1.909 2.029 2.155 2.286 2.423 2.566 2.716 2.874 3.039 3.214 3.397 3.59 3.793 4.007 4.232 4.469 4.718 4.979 5.251 5.534 5.827 6.126 6.43 6.734 7.033 7.324 7.6 7.856 8.087 8.289 8.457 8.589 8.683 8.736 8.75 8.75 8.737 8.708 8.663 8.604 8.531 8.447 8.351 8.245 8.131 8.009 7.881 7.746 7.607 7.463 7.316 7.166 7.015 6.861 6.707 6.552 6.397 6.242 6.089 5.936 5.784 5.634 5.486 5.34 5.196 5.054 4.914 4.777 4.643 4.511 4.383 4.256 4.133 4.013 3.895 3.78 3.668 3.559 3.452 3.349 3.248 3.149 3.054 2.961 2.87 2.782 2.697 2.614 2.533 2.455 2.379 2.305 2.233 2.164 2.096 2.031 1.967 1.906 1.846 1.788 1.732 1.677 1.624 1.573 1.524 1.476 1.429 1.384 1.34 1.298 1.257 1.217 1.178 1.141 1.105 1.07 1.036 1.003 0.971 0.94 0.91 0.882 0.854 0.826 0.8 0.775 0.75 0.726 0.703 0.681 0.659 0.638 0.618 0.598 0.579 0.561 0.543 0.525 0.509 0.493 0.477 0.462 0.447

</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="8.75" PeakHeight="464.082" Num="5" zHalfNm="401.01" Error="5.172">
-232.173 -41.667 12.95 4.255 -3.196
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="94.251" Depth="0.154"/>
<TopsideChapman PeakHeight="464.082" PeakDensity="949906.94" PeakScaleHeight="48.21" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
