<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 23:10:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.01 (060) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.519" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.656" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" 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="1.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="442.617" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="375.906" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.957" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="98.856" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.965" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.903" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="103.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 400.000 400.000 400.000 401.250 402.500 403.750 405.000 406.250 407.500 408.750 410.000 410.000 410.000 412.500 415.000 415.000 415.000 415.000 415.000 415.000 416.667 418.333 420.000 420.000 420.000 420.000 420.000 420.000 420.000 421.667 423.333 425.000 425.000 426.667 428.333 430.000 431.667 433.333 435.000 435.000 435.000 440.000 440.000 440.000 440.000 441.667 443.333 445.000 445.000 450.000 450.000 450.000 450.000 452.500 455.000 455.909 456.818 457.727 458.636 459.545 460.455 461.364 462.273 463.182 464.091 465.000 472.500 480.000 487.500 495.000 502.500 510.000 517.500 525.000 527.500 530.000 535.000 540.000 540.000 540.000 545.000 545.000 545.000 547.000 549.000 545.000 572.313 615.944
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 48 0 0 0 48 0 0 0 0 0 54 0 51 0 48 0 60 60 0 0 0 0 54 63 66 60 54 0 0 57 0 0 0 0 0 0 51 54 57 54 57 0 54 0 0 57 60 48 51 0 60 0 45 51 51 0 0 0 0 48 48 0 0 51 0 0 0 0 0 0 0 60 0 57 0 54 0 54 57 0 54 0 0 72 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 2.734375 -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 -1.171875 -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 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.171875 -2.734375 -2.734375 -1.171875 -0.390625 -0.390625 2.734375 -1.171875 -0.390625 2.734375 2.734375 2.734375 0.390625 -2.734375 1.953125 2.734375 -1.171875 -1.953125 -1.953125 1.171875 -1.953125 1.953125 1.953125 -1.953125 -1.953125 -1.953125 0.390625 1.171875 1.171875 -2.734375 -2.734375
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.102 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.205 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.307 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 442.617 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.31 0.282 0.243 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.231 0.253 0.276 0.298 0.321 0.344 0.354 0.383 0.442 0.51 0.586 0.671 0.764 0.865 0.975 1.092 1.217 1.349 1.487 1.633 1.785 1.943 2.107 2.278 2.454 2.637 2.825 3.019 3.219 3.425 3.636 3.852 4.074 4.302 4.534 4.77 5.011 5.256 5.503 5.753 6.004 6.254 6.503 6.748 6.986 7.214 7.43 7.628 7.804 7.953 8.071 8.152 8.194 8.2 8.198 8.183 8.153 8.11 8.054 7.987 7.909 7.822 7.727 7.623 7.513 7.397 7.276 7.15 7.021 6.888 6.753 6.616 6.478 6.338 6.198 6.058 5.918 5.778 5.639 5.502 5.365 5.23 5.096 4.964 4.834 4.706 4.581 4.457 4.336 4.217 4.1 3.986 3.875 3.766 3.659 3.555 3.453 3.353 3.257 3.162 3.07 2.98 2.893 2.808 2.725 2.644 2.566 2.49 2.416 2.343 2.273 2.205 2.139 2.075 2.012 1.952 1.893 1.835 1.78 1.726 1.674 1.623 1.573 1.525 1.479 1.434 1.39 1.348 1.307 1.267 1.228 1.191 1.154 1.119 1.084 1.051 1.019 0.988 0.958 0.928 0.9 0.872 0.845 0.819 0.794 0.77 0.746 0.723 0.701 0.679 0.658 0.638 0.619 0.6 0.581 0.563 0.546 0.529 0.513 0.497 0.482 0.467 0.453 0.439 0.425 0.412

</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="8.2" PeakHeight="442.617" Num="5" zHalfNm="375.906" Error="2.226">
-218.959 -22.321 15.265 -4.81 0.515
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.307" Depth="0.154"/>
<TopsideChapman PeakHeight="442.617" PeakDensity="834243.2" PeakScaleHeight="49.903" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
