<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-02 -275 10:16:00.000"
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="8.0">
<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="1 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.02 (275) 10:16:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.37" 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">
FF202627510021016009039031101000005008000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="1.525" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="1.919" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="2.879" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.050" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.360" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="806.667" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="806.667" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="85.626" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="86.705" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="2.061" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="1.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="830.000" 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="2.491" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="392.833" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="85.443" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.654" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="526.908" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.797" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="241.586" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="442.820" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
806.667 818.333 830.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
21 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.05 1.1 1.15 1.2 1.25 1.3 1.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
85.626 86.226 86.866 87.549 88.276 89.050 89.876
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
12 0 12 0 0 0 9
</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 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="190">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
84.644 85.0 86.705 90.0 92.331 95.0 97.956 100.0 103.582 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 392.833 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.776 1.36 1.337 1.292 1.292 1.292 1.317 1.36 1.361 1.363 1.365 1.368 1.37 1.373 1.375 1.377 1.38 1.382 1.385 1.387 1.39 1.392 1.395 1.398 1.401 1.403 1.406 1.409 1.413 1.416 1.419 1.423 1.427 1.431 1.436 1.441 1.447 1.454 1.463 1.472 1.482 1.491 1.497 1.501 1.505 1.508 1.51 1.512 1.514 1.516 1.517 1.518 1.519 1.52 1.521 1.522 1.522 1.523 1.523 1.524 1.524 1.524 1.525 1.525 1.525 1.525 1.525 1.525 1.525 1.525 1.524 1.524 1.523 1.522 1.522 1.521 1.52 1.518 1.517 1.516 1.514 1.513 1.511 1.509 1.507 1.505 1.503 1.501 1.498 1.496 1.494 1.491 1.488 1.486 1.483 1.48 1.477 1.474 1.471 1.467 1.464 1.461 1.457 1.454 1.45 1.447 1.443 1.439 1.435 1.432 1.428 1.424 1.42 1.415 1.411 1.407 1.403 1.399 1.394 1.39 1.385 1.381 1.376 1.372 1.367 1.362 1.358 1.353 1.348 1.343 1.339 1.334 1.329 1.324 1.319 1.314 1.309 1.304 1.299 1.294 1.289 1.284 1.278 1.273 1.268 1.263 1.258 1.252 1.247 1.242 1.237 1.231 1.226 1.221 1.215 1.21 1.205 1.199 1.194 1.189 1.183 1.178 1.173 1.167 1.162 1.157 1.151 1.146 1.14 1.135 1.13 1.124 1.119 1.113 1.108 1.103 1.097 1.092 1.087 1.081 1.076 1.07 1.065 1.06 1.054 1.049 1.044 1.038 1.033

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.36" PeakHeight="86.705" Num="3" Error="0.446">
-2.862 0.974 -0.173
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.36" EndFrequency="1.525" PeakHeight="392.833" Num="5" zHalfNm="85.4434" Error="0.0040">
-280.482 40.659 -62.705 13.277 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.877" Depth="0.068"/>
<TopsideChapman PeakHeight="392.833" PeakDensity="28853.908" PeakScaleHeight="241.586" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
